ROUND 1 OF 5
Drag the gold object to resize · Arrow keys for fine control
THE GAME AT A GLANCE
How long is a dugong beside a person? How high is Cloud Gate when the silhouette on your screen gives you no familiar doorway for scale? Size It Up turns questions like these into a free browser game. You see a fixed reference with a known measurement and a second object whose size is yours to judge.
Drag the target silhouette to make it larger or smaller, then lock in one estimate. Size It Up reveals the real measurement and shows your guess beside it. The daily Size It Up game has five shared rounds and a possible 500 points. You can play here without signing in, installing an app or reading the answers first.
ONE ROUND, STEP BY STEP
Imagine a round asking for the body length of a dugong. The reference is a person measured at 1.7 metres tall. This is an illustrative comparison from the Size It Up library, not a hint about today’s hidden answer.
First, read the dimension labels. A person’s height and a dugong’s body length are different axes, but both can be shown at the same scale. Keep the person unchanged. Stretch only the dugong until its nose-to-tail length looks plausible next to that 1.7-metre reference.
When you submit, Size It Up compares your estimated length with the stored 3-metre value. The reveal separates your guess from the true outline, so you can see whether you made the animal too short or too long. That visual correction is the useful part of a Size It Up round; the score is a quick summary.
HOW TO PLAY SIZE IT UP
Every Size It Up round follows the same three actions. The fixed object gives you an anchor; the gold target is the only shape you change.
Read the reference’s known size and the target’s measurement label. Size It Up may ask for height, length, wingspan or width; choose the named dimension before you judge the picture.
Drag the target silhouette itself to grow or shrink it. The reference stays fixed while the ruler and live measurement help you make a deliberate Size It Up estimate.
Submit the size you chose. Size It Up displays the actual dimension, your error and a score out of 100 for that round. Continue through all five rounds to build a total out of 500.
THE REVEAL
Size It Up keeps your estimated size visible and adds the true outline. Read the measurement as well as the picture: an object can feel close until the two endpoints are compared. You can inspect your error before moving to the next round.
Each Size It Up round is worth up to 100 points. Scoring is based on proportional error, so being twice as large is treated like being half the true size. The challenge board shows preset score targets to chase; it is not a live player leaderboard.
CHOOSE YOUR NEXT MOVE
Play the shared challenge, practise without a daily cap or check the measurements behind a surprising result.
Five daily rounds from the same set for everyone. Make a first guess, then try to beat your own total.
Play today NO DAILY CAPStart fresh five-round sets from the object library whenever you want another Size It Up challenge.
Play unlimited CHECK THE FACTSLook up each published object’s named dimension, measurement scope and source before your next run.
Explore objectsREAL MEASUREMENTS
Size It Up ranges from a 13-centimetre tarsier head-and-body length to the 634-metre architectural height of Tokyo Skytree. A number is useful only when you know exactly what it measures.
A 61.66-metre Concorde is measured nose to tail; Cloud Gate’s 10 metres describe height, not its width. The labels in Size It Up make those distinctions visible before you guess. These examples come from the published library; they do not disclose today’s answer order.
Browse the Size It Up object libraryhead and body length
body length
aircraft length
overall length
sculpture height
architectural height
THE HARD PART
Photographs often crop out people, doors and other familiar anchors. Size It Up places a known reference beside the target, but your intuition still has to decide whether a tiny-looking animal is genuinely small or simply shown far away.
An albatross’s wingspan is not its body length, just as a building’s height is not its footprint. Size It Up states the measurement for each round. After a Size It Up reveal, check whether the source reports a typical size, a maximum or an estimate before comparing two surprising numbers.
QUICK ANSWERS
Start the Size It Up game above, or use these answers when a result needs more context.
Yes. Size It Up Daily and Size It Up Unlimited both run in a browser without an account or download. The daily set has five shared rounds; Unlimited starts fresh sets without a daily cap. You can replay Size It Up Daily if you want to improve your own result on the same objects.
Yes. Size It Up works in a mobile browser. Drag the target shape to resize it, or use the smaller and larger buttons for fine adjustments. The reference object stays fixed on a phone, just as it does on a desktop screen.
No. Size It Up holds the dark reference silhouette and its labelled measurement fixed. Drag the gold target to adjust only your estimate. The ruler can change its visible range for readability, but the reference’s real-world value does not change. That fixed anchor is what makes a Size It Up comparison useful.
A round can earn up to 100 points. Size It Up compares the ratio between your estimate and the recorded measurement, so a guess at twice the actual size is treated like a guess at half the actual size. Five rounds add up to a possible 500 points. Ratio-based scoring lets Size It Up compare errors across both small animals and large landmarks.
No. The displayed scores are preset milestones that give you something to beat. Size It Up does not present those targets as scores from real named players. The Size It Up challenge board is a personal goal, not a ranking of other visitors.
A separate Size It Up Geography mode is not available here today. The daily game, Unlimited mode and object library include some landmarks and structures, but they are not presented as a standalone geography category.
Open the object library for published object guides and follow the linked references. The source method explains why we label a figure as typical, maximum, specimen-specific or estimated.