The five objects from the Size It Up puzzle on September 4, 2026, with the measured size of each, the reference it was compared against, a source you can check, and how the community's guesses landed. Want the surprise first? Replay this puzzle — archived days never touch your streak.
ROUND 1
Smartwatch — 4.5 cm
Answer: a smartwatch measures 4.5 cm (height), which is about 2.4× smaller than the reference, a light bulb at 11 cm.
Watch cases are sold by case diameter in millimetres, and 45 mm is a large one.
Common miss: players tend to inflate a smartwatch when it sits beside a light bulb — big things get squeezed, small familiar things get stretched.
Answer: the Roman Colosseum measures 189 m (length / span), which is about 1.4× smaller than the reference, the RMS Titanic at 269 m.
The ancient amphitheatre is roughly 189 metres along its longest axis.
Common miss: players tend to inflate the Roman Colosseum when it sits beside the RMS Titanic — big things get squeezed, small familiar things get stretched.
Answer: a birthday cake measures 25 cm (length / span), which is about 1.1× smaller than the reference, an American football at 28 cm.
A 25 cm round is the standard “serves twelve” size.
Common miss: players tend to inflate a birthday cake when it sits beside an American football — big things get squeezed, small familiar things get stretched.
Sizes are measured along the axis named in each round and link to their published source. Explore the full library by category, or read how scoring works.