size it up.

A little perspective

Trust your eye.

Five comparisons. Two objects each time. How close can you get?

  1. Compare

    The object on the left is your measuring stick. Keep resizing — the view automatically zooms out when you need more room. You can also zoom the canvas; both objects scale together without changing your estimate.

  2. Find the right size

    Drag the blue handle, scroll while hovering it, tap − / +, or use the arrow keys. Match the dimension in the question.

  3. Lock it in

    Reveal the real size and earn up to 100 points. Five rounds add up to a maximum of 500.

The first answer in each round counts. A new challenge arrives every day at 00:00 UTC. Object sizes use the specific examples shown in the answer.

Read the full rules and scoring guide
Practice · not ranked
All past challenges

How tall is a Statue of Liberty compared with an Airbus A380?

Use the Airbus A380 as your reference.

01 / 05
Airbus A380, reference object for height comparison
Statue of Liberty, estimated height relative to the Airbus A380
Airbus A380Reference
Statue of LibertyYour estimate
Fine tune
All past challenges
View answers and sources

Answers from this past challenge. Today’s challenge remains a surprise.

  1. Round 1

    How tall is a Statue of Liberty compared with an Airbus A380?

    Airbus A380, used for the height comparison
    ReferenceAirbus A38024 m high
    Statue of Liberty, used for the height comparison
    Compared objectStatue of Liberty92.99 m tall (ground to torch)

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 3.875×

    Statue of Liberty ÷ Airbus A380, comparing height.

    From the ground to the tip of the torch, the Statue of Liberty is 92.99 metres. This silhouette includes the pedestal.

    Measurement source · nps.gov

  2. Round 2

    How long is a bank card compared with a tennis ball?

    Tennis ball, used for the length comparison
    ReferenceTennis ball6.7 cm diameter (representative)
    Bank card, used for the length comparison
    Compared objectBank card8.56 cm long

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 1.278×

    Bank card ÷ Tennis ball, comparing length.

    An ID-1 bank card has nominal dimensions of 85.60 by 53.98 millimetres. This round compares its longer edge.

    Measurement source · entrust.com

  3. Round 3

    How long is a swimming pool compared with a diplodocus?

    Diplodocus, used for the length comparison
    ReferenceDiplodocus26 m long (museum estimate)
    Swimming pool, used for the length comparison
    Compared objectSwimming pool50 m long (racing distance)

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 1.923×

    Swimming pool ÷ Diplodocus, comparing length.

    A 50 m racing course is 50.000 metres between the touch panels. This silhouette spans that length.

    Measurement source · media.specialolympics.org

  4. Round 4

    How long is a table tennis table compared with a Komodo dragon?

    Komodo dragon, used for the length comparison
    ReferenceKomodo dragon3.13 m long (verified maximum)
    Table tennis table, used for the length comparison
    Compared objectTable tennis table2.74 m long

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 0.8754×

    Table tennis table ÷ Komodo dragon, comparing length.

    The playing surface of a table tennis table is 2.74 metres long and 1.525 metres wide. The vertical sides of the top are not part of that surface.

    Measurement source · documents.ittf.sport

  5. Round 5

    How tall is an Elizabeth Tower compared with an Eiffel Tower?

    Eiffel Tower, used for the height comparison
    ReferenceEiffel Tower330 m tall
    Elizabeth Tower, used for the height comparison
    Compared objectElizabeth Tower96.3 m tall

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 0.2918×

    Elizabeth Tower ÷ Eiffel Tower, comparing height.

    The Elizabeth Tower at the Palace of Westminster is 96.3 metres tall.

    Measurement source · parliament.uk
All past challengesPlay today’s challenge