DAILY NO. 26 · VERIFIED MEASUREMENTS
Today's five dinosaurs Size It Up comparisons with the measured size of each object, its reference and a source you can check. The puzzle is still live, so every answer stays hidden until you tap it. Haven't played yet? Play today's puzzle first.
The October 17, 2026 puzzle ran from an Ankylosaurus at 8 m to a Spinosaurus at 15 m, drawing on dinosaurs. The pair furthest apart was round 4: an Allosaurus is 1.4× as big as an American pickup truck.
Answer: Iguanodon — 10 m. An Iguanodon measures 10 m (length / span), which is about 1.1× smaller than the reference, an American school bus at 10.7 m.
Its thumb spike was first reconstructed, wrongly, as a horn on the nose.
Common miss: players tend to inflate an Iguanodon when it sits beside an American school bus — big things get squeezed, small familiar things get stretched.
Answer: Ankylosaurus — 8 m. An Ankylosaurus measures 8 m (length / span), which is about 1.1× smaller than the reference, a Triceratops at 9 m.
The tail club weighed tens of kilos and could swing hard enough to break bone.
Common miss: players tend to inflate an Ankylosaurus when it sits beside a Triceratops — big things get squeezed, small familiar things get stretched.
Answer: Spinosaurus — 15 m. A Spinosaurus measures 15 m (length / span), which is 1.2× as big as the reference, a Tyrannosaurus rex at 12.3 m.
The longest predatory dinosaur known, and probably one that spent much of its life in water.
Common miss: players tend to compress a Spinosaurus when it sits beside a Tyrannosaurus rex — big things get squeezed, small familiar things get stretched.
Answer: Allosaurus — 8.5 m. An Allosaurus measures 8.5 m (length / span), which is 1.4× as big as the reference, an American pickup truck at 5.9 m.
The common large predator of its day: far more Allosaurus fossils exist than T. rex ones.
Common miss: players tend to compress an Allosaurus when it sits beside an American pickup truck — big things get squeezed, small familiar things get stretched.
Answer: Stegosaurus — 9 m. A Stegosaurus measures 9 m (length / span), which is about 1.1× smaller than the reference, a Parasaurolophus at 9.5 m.
A brain the size of a lime, in a body as long as a bus.
Common miss: players tend to inflate a Stegosaurus when it sits beside a Parasaurolophus — 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.