DAILY NO. 30 · VERIFIED MEASUREMENTS

Size It Up answers – October 21, 2026

The five space objects from the Size It Up puzzle on October 21, 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 21, 2026 puzzle ran from the Perseverance rover at 3 m to the Sun at 1,392,700 km — 8 orders of magnitude apart, drawing on space. The pair furthest apart was round 1: the Sun is 508284672× as big as a concert grand piano.

ROUND 1

How wide is the Sun compared with a concert grand piano?

Answer: The Sun — 1,392,700 km. The Sun measures 1,392,700 km (length / span), which is 508284672× as big as the reference, a concert grand piano at 2.7 m.

The Sun is about 1.39 million kilometres in diameter.

Common miss: players tend to compress the Sun when it sits beside a concert grand piano — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 2

How long is the Perseverance rover compared with a Velociraptor?

Answer: Perseverance Rover — 3 m. The Perseverance rover measures 3 m (length / span), which is 1.5× as big as the reference, a Velociraptor at 2 m.

Perseverance is about the length of a small car.

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

Source ↗
ROUND 3

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 4

How tall is a Starship launch stack compared with a Saturn V rocket?

Answer: Starship Launch Stack — 121 m. A Starship launch stack measures 121 m (height), which is 1.1× as big as the reference, a Saturn V rocket at 110.6 m.

The complete Starship launch stack is about 121 metres tall.

Common miss: players tend to compress a Starship launch stack when it sits beside a Saturn V rocket — big things get squeezed, small familiar things get stretched.

Source ↗
ROUND 5

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 ↗

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.