DAILY NO. 21 · VERIFIED MEASUREMENTS

Size It Up answers – October 12, 2026

The five space objects from the Size It Up puzzle on October 12, 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.

The October 12, 2026 puzzle ran from the Perseverance rover at 3 m to Jupiter at 139,820 km — 7 orders of magnitude apart, drawing on space. The pair furthest apart was round 5: Earth is 3.7× as big as the Moon.

ROUND 1

How wide is Jupiter compared with Saturn?

Answer: Jupiter — 139,820 km. Jupiter measures 139,820 km (length / span), which is 1.2× as big as the reference, Saturn at 116,460 km.

Jupiter is almost eleven times wider than Earth.

Common miss: players tend to compress Jupiter when it sits beside Saturn — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 2

How long is the International Space Station compared with a Boeing 747?

Answer: International Space Station — 109 m. The International Space Station measures 109 m (length / span), which is 1.5× as big as the reference, a Boeing 747 at 70.7 m.

The ISS spans roughly 109 metres across its solar arrays.

Common miss: players tend to compress the International Space Station when it sits beside a Boeing 747 — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 3

How wide is Saturn compared with Jupiter?

Answer: Saturn — 116,460 km. Saturn measures 116,460 km (length / span), which is about 1.2× smaller than the reference, Jupiter at 139,820 km.

Saturn is more than nine times wider than Earth.

Common miss: players tend to inflate Saturn when it sits beside Jupiter — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 4

How long is the Perseverance rover compared with an adult horse?

Answer: Perseverance Rover — 3 m. The Perseverance rover measures 3 m (length / span), which is 1.3× as big as the reference, an adult horse at 2.4 m.

Perseverance is about the length of a small car.

Common miss: players tend to compress the Perseverance rover when it sits beside an adult horse — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 5

How wide is Earth compared with the Moon?

Answer: Earth — 12,742 km. Earth measures 12,742 km (length / span), which is 3.7× as big as the reference, the Moon at 3,474.8 km.

Earth is about 12,742 kilometres across.

Common miss: players tend to compress Earth when it sits beside the Moon — big things get squeezed, small familiar things get stretched.

Source ↗

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.

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