Pick a category

Play the size comparison game by category: animals, buildings and landmarks, space, dinosaurs, vehicles, sports and everyday objects, with a new set every day.

AnimalsGuess how big animals really are with a size comparison of animals you can play. Each round pairs a familiar reference — a car, a person, a bus or another animal — with an animal to resize, from a capybara to an Antarctic blue whale.27 objects
Buildings & landmarksTowers, statues, bridges and monuments look very different in photos than they do side by side. Size up the Eiffel Tower against the Empire State Building, Christ the Redeemer against the Statue of Liberty, or the Great Pyramid against the Washington Monument.21 objects
Space & planetsCompare planets, moons, the Sun and spacecraft from across the solar system on one shared scale. Is Titan bigger than Mercury? Is Pluto smaller than our Moon? How does the International Space Station compare with a jumbo jet?14 objects
DinosaursHow long was a Tyrannosaurus rex next to a bus, or a Velociraptor next to a person? Resize dinosaurs against familiar objects and animals and see how close your mental picture was.8 objects
Vehicles & transportAirliners, ships, cars, rockets and trains: guess their real length or height against something you know. Is the Titanic longer than the Washington Monument is tall? Is a Boeing 777-9 longer than a 747-8?21 objects
SportsCourts, pitches, tables and balls follow official rules, which makes them great reference points. How long is a tennis court next to a basketball court? How wide is a football goal compared with a car?17 objects
Everyday objectsCoins, batteries, furniture, a pallet and the average adult: small things are surprisingly hard to size from memory. Guess them against each other and against people.20 objects

How category rounds work

Each category has a set of five comparisons for today that is the same for everyone. It is played as practice, so it never changes your daily streak. After it, keep playing unlimited rounds from the same category. The mixed daily challenge draws from every category.