Mixed
Five scale shocks from across the whole collection.
156 CALIBRATED OBJECTS
Size It Up categories
The daily puzzle mixes every category. Each category page lists every object in it at its measured size, with the source behind the number — and an endless practice set on that one theme.
Animals
From bullfrogs and house cats to giraffes and blue whales.
Vehicles
Bikes, buses, aircraft, ships and engineering icons.
Landmarks
World-famous structures measured at true scale.
Space
Rockets, spacecraft and worlds that bend intuition.
Sports
Balls, equipment, goals, pools and playing fields.
Everyday
Objects you see constantly but rarely measure.
Food & Drink
A surprisingly difficult edible line-up.
Geography
Countries, states and islands compared by span.
Dinosaurs
Prehistoric giants, hunters and flying reptiles.
Technology
Phones, consoles, servers and modern machines.
Music
Instruments from pocket-sized to concert-hall huge.
Insects & Bugs
Tiny bodies, enormous wings and record breakers.