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 long is a Celestron Nature 10x25 monocular compared with a Beurer FT 09/1 thermometer?

Use the Beurer FT 09/1 thermometer as your reference.

01 / 05
Beurer FT 09/1 thermometer, reference object for length comparison
Celestron Nature 10x25 monocular, estimated length relative to the Beurer FT 09/1 thermometer
Beurer FT 09/1 thermometerReference
Celestron Nature 10x25 monocularYour estimate
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View answers and sources

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

  1. Round 1

    How long is a Celestron Nature 10x25 monocular compared with a Beurer FT 09/1 thermometer?

    Beurer FT 09/1 thermometer, used for the length comparison
    ReferenceBeurer FT 09/1 thermometer12.9 cm long
    Celestron Nature 10x25 monocular, used for the length comparison
    Compared objectCelestron Nature 10x25 monocular11.2 cm long

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 0.8682×

    Celestron Nature 10x25 monocular ÷ Beurer FT 09/1 thermometer, comparing length.

    For Celestron Nature 10x25 monocular, Celestron specifies 11.2 cm: overall body length along the optical axis, without the lanyard.

    Measurement source · celestron.co.uk

  2. Round 2

    How long is an axolotl compared with a 12-inch softball?

    12-inch softball, used for the length comparison
    Reference12-inch softball9.70 cm across (nominal)
    Axolotl, used for the length comparison
    Compared objectAxolotl30.48 cm long (large adult)

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 3.142×

    Axolotl ÷ 12-inch softball, comparing length.

    San Diego Zoo lists Axolotl at about 30.48 cm. This comparison uses the upper size listed, measured from snout to tail tip, with the body and tail extended.

    Measurement source · animals.sandiegozoo.org

  3. Round 3

    How tall is a Benin plaque compared with an adult?

    Adult, used for the height comparison
    ReferenceAdult1.7 m tall (representative)
    Benin plaque, used for the height comparison
    Compared objectBenin plaque48 cm tall

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 0.2824×

    Benin plaque ÷ Adult, comparing height.

    For Benin plaque, British Museum records 48 cm tall: Named brass relief plaque, bottom to top edge; excludes a display frame.

    Measurement source · britishmuseum.org

  4. Round 4

    How long is a narwhal compared with a white shark?

    White shark, used for the length comparison
    ReferenceWhite shark6.1 m long (maximum)
    Narwhal, used for the length comparison
    Compared objectNarwhal4.79 m long (large male)

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 0.7845×

    Narwhal ÷ White shark, comparing length.

    NOAA Fisheries lists Narwhal at about 4.79 m. This comparison uses the listed adult male size, measured from snout to the tail-fluke notch, excluding the tusk.

    Measurement source · fisheries.noaa.gov

  5. Round 5

    How long is an IKEA KONCIS garlic press compared with an ice hockey puck?

    Ice hockey puck, used for the length comparison
    ReferenceIce hockey puck7.62 cm across
    IKEA KONCIS garlic press, used for the length comparison
    Compared objectIKEA KONCIS garlic press16 cm long

    Illustrations shown individually, not to a shared scale.

    Actual size ratio

    ≈ 2.1×

    IKEA KONCIS garlic press ÷ Ice hockey puck, comparing length.

    IKEA KONCIS garlic press measures 16 cm; this comparison uses the overall length with both handles closed together.

    Measurement source · ikea.com
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