Size It Up Game Guide: How to Play, Scoring and Tips for a Perfect 1,000

What is Size It Up?

Size It Up is a browser puzzle about real-world sizes. Each round shows a black reference — something drawn at its true scale — and a white silhouette of another thing. Your job is to stretch or shrink the silhouette until it is the right size compared with the reference.

It is free at sizeitup.games, needs no account, and also has free apps for iPhone/iPad and Android. Streaks, history and best scores are saved in your browser.

Note: there is more than one game with this name. This guide covers the daily web game at sizeitup.games, which says it is independent and not affiliated with Magnitudle's game of the same name.

How to play Size It Up

• Resize the white silhouette: slide anywhere on the board, drag the corner grip, tap the ruler, pinch on a phone, or use the arrow keys.
• The reference never changes size — only your silhouette does.
• Press Enter (or the lock button) to lock in your guess.
• The true size appears in red over your guess, with the real measurement, your percentage error and your score.
• Play all 5 daily rounds to keep your streak going.

You can switch between metres and feet and inches, and between Classic and Illustrated silhouettes — the sizes and scoring are the same either way.

How Size It Up scoring works

Your score depends on the ratio between your guess and the true size, so guessing half the real size scores exactly the same as guessing double. The official points per round:

• Within 6%: 100 points
• 12% off: 90
• A fifth off: 78
• A third off: 62
• Half or double: 45
• Three times off: 30
• Five times off: 0

Daily rounds are weighted: rounds 1 and 2 count ×1, round 3 counts ×2, and rounds 4 and 5 count ×3. That makes the daily maximum 1,000 points — and it means the last two rounds are worth more than the first three put together.

Tips to score higher

• Save your focus for rounds 4 and 5. They are worth ×3 each — 600 of the 1,000 points.
• Count references. Ask how many references would fit along the silhouette, then set the size to that count. Counting beats eyeballing.
• When torn between two sizes, pick the middle by ratio, not by length. Because scoring uses ratios, if you think something is between 2 m and 8 m, guess about 4 m (half of 8 and double 2), not 5 m.
• Anchor on sizes you know: an adult is about 1.7 m tall, a car about 4.5 m long, a school bus about 12 m, a basketball hoop 3.05 m high.
• Check which dimension is measured. Length, height and wingspan give very different answers for animals and planes — look at how the reference is drawn.
• Practise weak categories in Unlimited. Dinosaurs, space and insects are where most people's instincts are furthest off.

Modes and categories

• Daily — five shared puzzles, new at midnight in your time zone.
• Unlimited — random pairs from the whole library, no daily cap.
• Size Comparison Game — a separate mode for comparing real proportions.
• Geography — countries, US states and lakes as cut-outs.

Categories include Mixed (the daily default), Animals, Geography, Pop Culture, Vehicles, Dinosaurs, Space, Everyday Objects, Insects, Landmarks, Food & Drink and Sports Gear. Plants & Trees, Musical Instruments and Microscopic World were listed for voting and not yet playable when we checked.

Every size in the game links to a source — usually an encyclopedia or a manufacturer's specification — and corrections can be sent to the developers.

Games like Size It Up

• Krillion — a daily trivia dive where the rarest correct answer scores most. Read our Krillion guide.
• Wordle and Connections — the New York Times' daily word puzzles.
• GeoGuessr-style daily games — guess a location from a street view.
• Bridge Snap — if judging sizes and forces is your thing, build a bridge and see whether it holds a truck.

Frequently asked questions