Field manual
How to play Sizedle
The daily set
Every local midnight a new set of five objects is drawn from a pool of 181 — animals, dinosaurs, landmarks, nature, vehicles, spacecraft, food, sports and everyday things. The draw is seeded by the calendar date, so everyone playing on the same date gets the same five targets paired with the same references.
Resize, then commit
On the left of the stage is a reference silhouette at its true size. On the right is the target. Drag the stage, scroll, or use the slider to grow or shrink the target until the proportions look right. The control is logarithmic, so it covers everything from fleas to mountains. When the target gets too big for the stage, the view zooms out and tells you by how much. Locking in draws the true size in red over your guess.
Each object is measured along its longest side — height for towers and people, length for animals and vehicles, wingspan for birds and planes, diameter for balls and asteroids. The reveal tells you which.
Scoring
Locking in converts your slider into an implied size. The closer to the truth, the more points:
| Your estimate vs. real size | Points |
|---|---|
| Within 6% | 100 |
| Within 12% | 90 |
| Within 20% | 78 |
| Within 32% | 62 |
| Within 2× | 45 |
| Within 3× | 30 |
| Within 4× | 15 |
| Worse than 4× | 0 |
Each round is worth up to 100 points, so a perfect daily set is 500. Twice as big and half as big are the same size of miss.
Unlimited mode and challenges
Unlimited mode deals random sets of 5, 10 or 20 rounds, optionally from a single category. Each set has a seed in its link: share it and a friend gets the same rounds. Unlimited sets never touch your daily result or streak.
The archive
Missed a day? The archive replays any past daily set exactly as it was. Archive scores are kept separately and don’t affect your streak.
Tips
- Think in multiples of the reference: “about three buses long” beats guessing meters.
- Watch the zoom note — a target that forces the view to zoom out ×10 is ten times the reference.
- Heights of buildings are usually taller than they feel; animals are usually smaller than they feel.
- After each reveal, open “More about this size” to see the object next to other familiar things.
Streaks and storage
Finishing the daily set on consecutive local days builds your streak. Results and best scores are stored in
localStorage on this device. There is no account, and your guesses stay on this device.