A Travel Price Comparison for Families, Couples, and Backpackers Liverpool vs. Heidelberg for Food, Nightlife, Families, and Couples

Should you visit Liverpool or Heidelberg?

Which is cheaper to visit? Which is more expensive for vacation?

Trying to figure out where to travel next? This travel comparison between Liverpool and Heidelberg can help. It includes a travel cost comparison in addition to other factors. For many travelers, the cost of a destination is a primary consideration when choosing where to go.

Liverpool

Liverpool is a diverse, historic, and fun-filled port city. It's also popular because of the live music, shopping, and museums.

Heidelberg

Heidelberg is a character-filled, historic, and quaint town. The famous beauty of this place is one of the main draws. With a quaint atmosphere, it also offers a unique feeling. And you can't forget about the food, shopping, and nightlife.

Liverpool and Heidelberg: Pros and Cons

Pros
  • Popular museums and historical sights
  • Numerous theater shows
  • Active nightlife
  • Good music scene
  • Family-friendly
  • Good for couples and romance
  • Good for backpackers and budget travelers
Things to Consider
  • Less popular for food
Pros
  • Popular for food and cuisine
  • Active nightlife
  • Scenic old town
  • Family-friendly
  • Good for couples and romance
  • Good for backpackers and budget travelers
  • Impressive beauty
  • Quaint atmosphere


Is there more to do in Liverpool or Heidelberg?

Travelers will usually find more to do in Liverpool than Heidelberg, as it is bigger with more sights, attractions, and activities for visitors. Liverpool is more popular for its museums, theatre productions, music, and shopping, while Heidelberg is known for its food, historical sights, impressive beauty, and quaint atmosphere. Heidelberg is more touristy than Liverpool and is popular for its picturesque beauty, romantic atmosphere, and its classic old town. Liverpool is popular for its many museums and art galleries, as well as being the hometown of "The Beatles." It is also home to The Liverpool Cathedral.

How is Liverpool different from Heidelberg?

Which is Better for a Holiday?

Let's take a look at the differences and similarities between Heidelberg and Liverpool. Then, you can decide for yourself which place is better for your next trip.

Are the Museums and Historical Sights Better in Liverpool or Heidelberg?

Liverpool
Heidelberg

Liverpool is a good destination for its historical sights. However, Heidelberg does not have museums and landmarks.

If you're looking for an educational opportunity, there are a decent number of museums and historical sights around Liverpool. Popular museums around town include Merseyside Maritime Museum, Victoria Gallery and Museum, and Walker Art Gallery.

Heidelberg does not have museums and landmarks.


Is Liverpool or Heidelberg Better for Theater?

Liverpool
Heidelberg

Liverpool is a great port city for its shows and theatre. However, Heidelberg is not a theatre destination.

Liverpool offers many theater and performance venues for visitors. The city has a diverse theater scene with major venues showing world renowned productions as well as cozy, local venues with small shows.

Heidelberg is not a theatre destination.

Is the Food Better in Liverpool or Heidelberg? Which Destination has the Best Restaurants?

Liverpool
Heidelberg

Heidelberg is well known for its restaurant scene. However, Liverpool is not particularly known for its local flavors and cuisine.

Eating is part of the travel experience when you visit Heidelberg. The old town is filled with local restaurants that offer an assortment of traditional dishes. The restaurants offer a mix of outdoor and indoor seating and classic dishes include saumagen, lewwerkneedl, and dampfnudeln.

Liverpool may not make the list for most foodies, but you'll find what you need while you're in town. There are a diversity of flavors that are influenced by the city's international population. There are also several famous local dishes including scouse (a meat stew), toad in the hole (a giant yorkie stuffed with British sausages) and wet nelly (a dessert).

Is Liverpool or Heidelberg Better for Nightlife?

Liverpool
Heidelberg

Party-goers will find similar levels of energy in Liverpool and Heidelberg.

Liverpool is a popular destination for visitors looking to party into the night. The nightlife is fun and diverse Head to the waterfront for comedy clubs or the Ropewalks and Seel Street if you want a swanky experience. Cavern Quarter is the place to go for an all night party.

Many people head to Heidelberg for the nightlife scene. As a university town, you'll find a very young population and many bars, pubs, and nightclubs where you can hang out.


Is Liverpool or Heidelberg Better for Music?

Liverpool
Heidelberg

Liverpool is an amazing port city to visit for its music scene. However, Heidelberg is not a live music destination.

Liverpool has become a mecca for musicians from around the world. Known as the birthplace of the Beatles, the city has been established as a rock and pop capital since the 1950s.

Heidelberg is not a live music destination.

Is Liverpool or Heidelberg Better for its Old Town?

Liverpool
Heidelberg

Heidelberg is an unbeatable place for its old town. However, Liverpool does not have a historic old town.

With a famous historical old-town, Heidelberg offers plenty to see. The charming old town, or Altstadt, is lined with cafes that spill out onto the street and churches with bells that chime hourly. The area is filled with activity and there are many shops, ice cream vendors, and restaurants to choose from.

Liverpool does not have a historic old town.

Is the Shopping Better in Liverpool or Heidelberg?

Liverpool
Heidelberg

Liverpool is a great port city for its shopping areas. Also, Heidelberg is not as popular, but is still a nice town for shopping.

Many visitors explore the shopping areas in Liverpool. Head to Liverpool ONE for the area's best shopping. This is the largest open-air shopping center in the UK and it's filled with a mix of name brands and independent vendors.

Heidelberg is a great destination for shopping. The pedestrian area is the best place to pass your time shopping. There are name brand stores mixed in with local independent shops which you'll mostly find on the side streets. Popular items to buy include wooden toys, Christmas decorations, and candy.


Is Liverpool or Heidelberg Better for Families?

Liverpool
Heidelberg

Liverpool is a great port city for its kid-friendly activities. Also, Heidelberg is not as popular, but is still a nice town for its family-friendly activities.

You'll find plenty of family-friendly things to do in Liverpool. One of the most popular activities for families is Pleasureland, an amuseument park with rides that are fun for young kids. The city also has many museums and play spaces that are great for families.

Heidelberg is a family-friendly place to visit. With its many ice cream shops, playgrounds, and impressive castle, this city makes a nice stop for families with kids. The restaurants usually have a kid's menu and there are a number of kid-friendly museums and activities.

Is Liverpool or Heidelberg Better for Couples?

Liverpool
Heidelberg

Heidelberg is well known for its romantic activities. Also, Liverpool is still popular, but not quite as popular for couples.

Couples visit Heidelberg frequently as it offers plenty of romantic activities. This beautiful city offers an impressive backdrop for a couple's getaway. The view from the castle looks out beautifully over the city and the old town has many excellent restaurants and activities that are great for couples.

Liverpool is a good port city for couples to visit. The city is fun, and the best way to enjoy a romantic getaway is to find a fun or unique activity that you can enjoy together. Going dancing, dining out, or seeing a show are all fun activities in the area.

Is Liverpool or Heidelberg Better for Backpackers and Budget Travelers?

Liverpool
Heidelberg

Heidelberg is well known for backpackers. Also, Liverpool is still popular, but not quite as popular for backpackers and budget travelers.

Heidelberg is a great town to visit for backpackers. Prices are reasonable and there are a handful of hostels around town. As a university town, you can be assured there are plenty of fun activities and cheap places to eat.

Plenty of backpackers visit Liverpool. The city has some fun hostels where you can stay and meet other travelers.


Is Liverpool or Heidelberg Better for Students?

Liverpool
Heidelberg

Liverpool is a great port city for its student-friendly activities. Also, Heidelberg is not as popular, but is still a nice town for students.

Many students visit Liverpool. The city is diverse, affordable, and offers an excellent academic environment. International students will fill welcomed and enjoy a fun city with a lot to offer.

Heidelberg is a good port city to visit for students. It is a beautiful student town with a lot of activities for young visitors. This is not the most popular study abroad destination, but it does have a lot to offer for those who visit.

Is Liverpool or Heidelberg Better for Public Transit? Which Is Easier to Get Around Without a Car?

Liverpool
Heidelberg

Heidelberg is well known for its public transit. Also, Liverpool is still popular, but not quite as popular for times when you don't have a car.

The public transit in Heidelberg can get you around easily. There are trams and buses that connect the old town to the train station.

While Liverpool offers some public transit options, it might not be your first choice. There are trains, buses, and ferries around the area.

Is Liverpool or Heidelberg a more walkable city?

Liverpool
Heidelberg

Liverpool and Heidelberg both are very good when exploring on foot.

Liverpool is a very walkable port city.

Heidelberg is a very walkable destination. The old town is particularly walkable.


For even more information, also check out Is Liverpool Worth Visiting? and Is Heidelberg Worth Visiting?.

Should I spend more time in Heidelberg or Liverpool?

How long in Liverpool or Heidelberg?

Visitors can find plenty of fun things to do in both Liverpool and Heidelberg. In our opinion, Liverpool has more to see and do, so we recommend that you spend more time in Liverpool than Heidelberg. In general, 2-3 days is a good amount of time for Liverpool, and 1-3 days is enough time in Heidelberg.

Families should spend more time in Liverpool than Heidelberg. Because of the many family-friendly attractions and fun things to do for kids in Liverpool, it's a great place to visit with the whole family.

Couples should spend more time in Heidelberg than Liverpool. You'll find plenty of romantic sights and fun activities in Heidelberg that are perfect for a weekend getaway or a longer couple's trip.

Backpackers and budget travelers should spend more time in Heidelberg than Liverpool if your budget allows for it. With a larger number of budget-friendly sights, good nightlife, and active things to do, anyone traveling on a budget would have a good time in Heidelberg.


  • How many days in Liverpool or Heidelberg? Ideal Length of Stay
    Liverpool 2-3 
    Heidelberg 1-3

One day in Liverpool or Heidelberg?

With live music and shopping around the historic port city of Liverpool, there's plenty to do. Anyone can find something fun to do here. One of the main draws to the area is the live music. But since there are so many activities, you'll likely want to spend more than one day exploring.

You'll find food and shopping around the quaint town of Heidelberg. Visiting the old town is also a must. One day is a great amount of time to relax and see the many things that Heidelberg has to offer. It has many unique tourist attractions and fascinating things to do.

A weekend in Liverpool or Heidelberg?

With shopping and museums around the destination of Liverpool, there's plenty to do. It offers something for everyone. Many people spend a weekend here. One of the main draws to the area is the live music. In a weekend, you should have a good grasp of this port city.

You'll find shopping and nightlife around the scenic destination of Heidelberg. The old town is one of the main draws for visitors. This is a popular place to visit for a weekend.A weekend should give you a good understanding of everything this town has to offer. This town offers a variety of activities to choose from.

Five days in Liverpool or Heidelberg?

Liverpool, a popular port city, is full of activities for travelers. Most people find that five days is more than enough time to see everything. Your budget might influence how long you stay.

Travelers enjoy the nightlife and food when visiting the quaint town of Heidelberg. The length of your ideal trip is an individual decision. Exploring the old town is a popular activity. Five days is plenty of time to see everything, even with extra days to spare.


A week in Liverpool or Heidelberg?

Liverpool is a popular place that is full of things to see and experience. One of the main draws to the area is the live music. One week is plenty of time to see everything, even with extra days to spare. It has many unique tourist attractions and fascinating things to do.

Heidelberg is a popular choice for travelers. Make sure you visit the old town while you're here. One week is usually plenty of time to spend here with extra days to spare. With this much time, visitors often visit nearby destinations or take day trips. It will give you the chance to have new experiences.


For some great organized tour ideas, see The Best Adventure Tours to United Kingdom, The Best Sightseeing Tours in United Kingdom, The Best Vineyard & Wine Tours in Germany, and The Best Food and Culinary Tours in Germany.


Which place is cheaper, Heidelberg or Liverpool?

These are the overall average travel costs for the two destinations.

The average daily cost (per person) in Liverpool is £161, while the average daily cost in Heidelberg is £121. These costs include accommodation (assuming double occupancy, so the traveler is sharing the room), food, transportation, and entertainment. While every person is different, these costs are an average of past travelers in each destination. What follows is a categorical breakdown of travel costs for Liverpool and Heidelberg in more detail.



Accommodation
  • Accommodation Hotel or hostel for one person
    Liverpool £76
    Heidelberg £79
  • Accommodation Typical double-occupancy room
    Liverpool £152
    Heidelberg £158
Compare Hotels in Liverpool and Heidelberg

Looking for a hotel in Liverpool or Heidelberg? Prices vary by location, date, season, and the level of luxury. See below for options and compare which is best for your budget and travel style.

Hotels in Liverpool


Hotels in Heidelberg


Kayak helps you find the best prices for hotels, flights, and rental cars for destinations around the world. Compare prices for multiple destinations when planning your next trip.


Our Analysis
We've analyzed the average and typical hotel prices based on guest reviews, star ratings, and hotel amenities here: Liverpool Hotel Prices and Heidelberg Hotel Prices.

Local Transportation
  • Local Transportation Taxis, local buses, subway, etc.
    Liverpool £26
    Heidelberg £15
Typical Local Transportation Prices in Liverpool

Below are a few samples from actual travelers for transportation costs in Liverpool:


  • City bike hire Liverpool
    £6.00

Hired Cars and Shuttles in Liverpool

Some specific examples of transportation prices in Liverpool:

  • Departure Private Transfer: Liverpool to Manchester Airport MAN in Luxury Van: $195
  • Beatles-Themed Private Taxi Tour with Transfers: $162
  • Liverpool Airport (LPL): Transfer to Liverpool Cruise Port: $148
  • Liverpool Airport (LPL): Transfer to Liverpool Accommodation: $148
  • Liverpool Cruise Port: Private Transfer to Liverpool: $148
  • Liverpool Private Transfer from central Liverpool to Liverpool Airport: $123
  • Departure Private Transfer: Liverpool to Manchester Airport MAN in Business Car: $121
  • Private Transfer from Liverpool Airport (LPL) to Holyhead Port: $103
  • Liverpool Cruise Port to Liverpool hotels - Round-Trip Private Transfer: $83
  • Liverpool Airport (LPL) to Liverpool Port - Round-Trip Transfer: $83
  • Arrival Private Transfer: Liverpool Airport LPL to Liverpool in Luxury Van: $79
  • Liverpool to Manchester Airport(MAN) - Departure Private Transfer: $79

Hired Cars and Shuttles in Heidelberg

Also for Heidelberg, here are a few examples of actual transportation services:

  • Airport transfer from Karlsruhe Airport to Baden-Baden: $105
  • Karlsruhe Airport (FKB) to Baden-Baden - Arrival Private Transfer: $23
  • Karlsruhe Airport (FKB) to BadenBaden Round-Trip Private Transfer: $46
  • One Way Private Transfer from Mannheim to Frankfurt : $251
  • Privat Transfer From Basel EuroAirport BSL To Badenweiler : $126
  • Private Transfer from Badenweiler Thermal to Basel EuroAirport: $63
  • Private Transfer from Heidelberg City to Mannheim City by Van: $64

Is it cheaper to fly into Liverpool or Heidelberg?

Prices for flights to both Heidelberg and Liverpool change regularly based on dates and travel demand. We suggest you find the best prices for your next trip on Kayak, because you can compare the cost of flights across multiple airlines for your prefered dates.





Food
  • Food Meals for one day
    Liverpool £59
    Heidelberg £32

Food Tours and Cooking Classes in Liverpool

Also, here are some specific examples of food and dining related activities in Liverpool.

  • Brewery Bus Tour with Beer Tasting and Pizza: $81
  • Brewery bus tour, 5 breweries, 12 beers, 1 pizza, 1 bus: $89
  • Guided Food Tour with Tastings: $100

Food Tours and Cooking Classes in Heidelberg

For Heidelberg, here are some samples of tours and activities related to meals and dining experiences:

  • Heidelberg crime dinner to solve the mystery with a delicious 3-course menu: $64
  • Craft Beer and Street Food Tour: $598

Entertainment
  • Entertainment Entrance tickets, shows, etc.
    Liverpool £36
    Heidelberg £9.82

Tours and Activities in Liverpool

Here are a few actual costs in Liverpool for available activities, ticket prices, and tours:

  • A Hope Street Stroll: A self-guided tour from the Metropolitan Cathedral to LIPA: $5.20
  • A Walk Through Time: History of Liverpool Walking Tour: $22
  • Alcotraz Prison Cocktail Experience in Liverpool: $51
  • Awesome Corners of Liverpool – Family Walking Tour: $286
  • BEST OF LIVERPOOL History & Culture Tour-From The Cruise Terminal: $27
  • BEST OF LIVERPOOL-Heritage, History & Culture Guided Walking Tour: $27
  • Beatles & Beyond: A Liverpool Legacy Tour: $303
  • Beatles Classic Tour of Liverpool by Private Taxi: $234
  • Beatles Famous Walking Tour Of Liverpool-From the Cruise Terminal: $27
  • Beatles Magical Mystery Tour: $25
  • Best of Liverpool Sightseeing Tour by Private Taxi: $252
  • Brews, Views, football & History Tour: $82

Tours and Activities in Heidelberg

Also, here are some specific examples of entertainment, tickets, and activities for Heidelberg.

  • First Discovery Walk and Reading Walking Tour: $3.21
  • Heidelberg's Altstadt: A Self-Guided Audio Tour: $5.20
  • Heidelberg's Altstadt: A Self-Guided Audio Tour: $5.99
  • City Exploration Game and Tour on your Phone: $6.41
  • Pure experience: Original Black Forest farmer smoke tour: $6.54
  • Heidelberg Scavenger Hunt and Best Landmarks Self-Guided Tour: $6.54
  • City Exploration Game and Tour: $6.95
  • Heidelberg Highlights Self-Guided Scavenger Hunt & City Tour: $6.95
  • Walking Tour with Audio Guide on App: $8.02
  • Complete Self-guided Audio Tour on your Phone: $8.54
  • Uncover A Self-Guided Audio Tour Through Time: $11
  • Walking Tour with Audio Guide on App: $11

Alcohol
  • Alcohol Drinks for one day
    Liverpool £13
    Heidelberg £15

Sample the Local Flavors in Liverpool

Also in Liverpool, these are the prices for nightlife and alcohol related activities from various tour providers:

  • FunnyBoyz Liverpool - Drag Shows, Tributes, Brunches & Bar Crawls: $19
  • Liverpool Bar Maid-led Pub Crawl for Special Events: $50
  • Pirate Pub Crawl & Boat Tour: $56

Sample the Local Flavors in Heidelberg

Here are a few nightlife and alcohol tours and activities from local tour providers in Heidelberg:

  • Highlights of the romantic Black Forest & brewery, private tour: $295


When we compare the travel costs of actual travelers between Liverpool and Heidelberg, we can see that Liverpool is more expensive. And not only is Heidelberg much less expensive, but it is actually a significantly cheaper destination. So, traveling to Heidelberg would let you spend less money overall. Or, you could decide to spend more money in Heidelberg and be able to afford a more luxurious travel style by staying in nicer hotels, eating at more expensive restaurants, taking tours, and experiencing more activities. The same level of travel in Liverpool would naturally cost you much more money, so you would probably want to keep your budget a little tighter in Liverpool than you might in Heidelberg.

If you're trying to decide if either of these two destinations are within your price range, also see Is Liverpool Expensive? and Is Heidelberg Expensive?.


Which is Bigger, Liverpool or Heidelberg?

Liverpool has a larger population, and is about 3 times larger than the population of Heidelberg. When comparing the sizes of Liverpool and Heidelberg, keep in mind that a larger population does not always imply the destination has more attractions or better activities. So, always research the type of place that you want to visit along with the activities and attractions that interest you.


When is the best time to visit Liverpool or Heidelberg?

Both places have a temperate climate with four distinct seasons. As both cities are in the northern hemisphere, summer is in July and winter is in January.

Should I visit Liverpool or Heidelberg in the Summer?

Both Heidelberg and Liverpool during the summer are popular places to visit. The music scene and the family-friendly experiences are the main draw to Liverpool this time of year. Furthermore, many travelers come to Heidelberg for the family-friendly experiences.

In the summer, Liverpool is cooler than Heidelberg. Typically, the summer temperatures in Liverpool in July average around 15°C (60°F), and Heidelberg averages at about 21°C (69°F).

In Heidelberg, it's very sunny this time of the year. In the summer, Liverpool often gets less sunshine than Heidelberg. Liverpool gets 176 hours of sunny skies this time of year, while Heidelberg receives 224 hours of full sun.

Liverpool usually gets less rain in July than Heidelberg. Liverpool gets 65 mm (2.6 in) of rain, while Heidelberg receives 78 mm (3.1 in) of rain this time of the year.


  • Summer Average Temperatures July
    Liverpool 15°C (60°F) 
    Heidelberg 21°C (69°F)

Should I visit Liverpool or Heidelberg in the Autumn?

The autumn attracts plenty of travelers to both Liverpool and Heidelberg. Many travelers come to Liverpool for the shopping scene and the music scene. Furthermore, many visitors come to Heidelberg in the autumn for the shopping scene and the natural beauty of the area.

In October, Liverpool is generally around the same temperature as Heidelberg. Daily temperatures in Liverpool average around 12°C (53°F), and Heidelberg fluctuates around 12°C (54°F).

Liverpool usually receives around the same amount of sunshine as Heidelberg during autumn. Liverpool gets 97 hours of sunny skies, while Heidelberg receives 102 hours of full sun in the autumn.

In October, Liverpool usually receives more rain than Heidelberg. Liverpool gets 78 mm (3.1 in) of rain, while Heidelberg receives 57 mm (2.2 in) of rain each month for the autumn.


  • Autumn Average Temperatures October
    Liverpool 12°C (53°F) 
    Heidelberg 12°C (54°F)

Should I visit Liverpool or Heidelberg in the Winter?

The winter brings many poeple to Liverpool as well as Heidelberg. Many visitors come to Liverpool in the winter for the museums, the shopping scene, the theater shows, and the cuisine. Additionally, most visitors come to Heidelberg for the shopping scene and the cuisine during these months.

Heidelberg can be very cold during winter. Liverpool is much warmer than Heidelberg in the winter. The daily temperature in Liverpool averages around 5°C (42°F) in January, and Heidelberg fluctuates around 3°C (37°F).

In the winter, Liverpool often gets more sunshine than Heidelberg. Liverpool gets 53 hours of sunny skies this time of year, while Heidelberg receives 38 hours of full sun.

Liverpool usually gets more rain in January than Heidelberg. Liverpool gets 69 mm (2.7 in) of rain, while Heidelberg receives 52 mm (2 in) of rain this time of the year.


  • Winter Average Temperatures January
    Liverpool 5°C (42°F) 
    Heidelberg 3°C (37°F)

Should I visit Liverpool or Heidelberg in the Spring?

Both Heidelberg and Liverpool are popular destinations to visit in the spring with plenty of activities. Also, the spring months attract visitors to Heidelberg because of the natural beauty.

In the spring, Liverpool is cooler than Heidelberg. Typically, the spring temperatures in Liverpool in April average around 8°C (47°F), and Heidelberg averages at about 11°C (52°F).

Liverpool usually receives less sunshine than Heidelberg during spring. Liverpool gets 144 hours of sunny skies, while Heidelberg receives 155 hours of full sun in the spring.

In April, Liverpool usually receives less rain than Heidelberg. Liverpool gets 51 mm (2 in) of rain, while Heidelberg receives 57 mm (2.2 in) of rain each month for the spring.


  • Spring Average Temperatures April
    Liverpool 8°C (47°F) 
    Heidelberg 11°C (52°F)

Typical Weather for Heidelberg and Liverpool

Liverpool Heidelberg
Temp (°C) Rain (mm) Temp (°C) Rain (mm)
Jan 5°C (42°F) 69 mm (2.7 in) 3°C (37°F) 52 mm (2 in)
Feb 5°C (41°F) 50 mm (2 in) 4°C (39°F) 52 mm (2 in)
Mar 6°C (44°F) 61 mm (2.4 in) 7°C (45°F) 53 mm (2.1 in)
Apr 8°C (47°F) 51 mm (2 in) 11°C (52°F) 57 mm (2.2 in)
May 11°C (52°F) 61 mm (2.4 in) 16°C (60°F) 82 mm (3.2 in)
Jun 14°C (56°F) 67 mm (2.6 in) 19°C (65°F) 79 mm (3.1 in)
Jul 15°C (60°F) 65 mm (2.6 in) 21°C (69°F) 78 mm (3.1 in)
Aug 15°C (60°F) 81 mm (3.2 in) 20°C (68°F) 70 mm (2.8 in)
Sep 14°C (57°F) 71 mm (2.8 in) 17°C (63°F) 63 mm (2.5 in)
Oct 12°C (53°F) 78 mm (3.1 in) 12°C (54°F) 57 mm (2.2 in)
Nov 8°C (47°F) 78 mm (3.1 in) 7°C (44°F) 65 mm (2.6 in)
Dec 6°C (44°F) 78 mm (3.1 in) 4°C (38°F) 63 mm (2.5 in)