ALL ANSWERS · DINOSAURS · DAILY No. 20 · SEPTEMBER 23, 2026
Size It Up Dinosaurs answer: September 23
The five Dinosaurs silhouettes for September 23, with the true sizes. If you have not played yet, this page is a spoiler — play these five first, then come back to argue with the numbers.
Day 20 ran from a velociraptor (1.8 m) to a diplodocus (26 m). The widest gap was round 4, Diplodocus against Camptosaurus, at 5.2×; the closest call was round 2, Ceratosaurus against Yangchuanosaurus, only 1.4× apart — the kind of round that separates a 90 from a 60.
SPOILER · TODAY’S FIVE
You have not finished today’s puzzle on this device. The answers below are blurred so you can still play first.
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ROUND 1
Acrocanthosaurus Acrocanthosaurus atokensis vs Gigantoraptor Gigantoraptor erlianensis
Gigantoraptor · reference · 8 m Acrocanthosaurus · true length · 12 m 1.5× longer than the gigantoraptor
Acrocanthosaurus is represented here by a selected estimated total length of 12 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 2
Ceratosaurus Ceratosaurus nasicornis vs Yangchuanosaurus Yangchuanosaurus shangyouensis
Yangchuanosaurus · reference · 10 m Ceratosaurus · true length · 7 m 1.4× shorter than the yangchuanosaurus
Ceratosaurus is represented here by a selected estimated total length of 7 m. Dinosaur reconstructions vary; this is the source value used for this comparison.
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ROUND 3
Eotyrannus Eotyrannus lengi vs Brachiosaurus Brachiosaurus altithorax
Brachiosaurus · reference · 22 m Eotyrannus · true length · 5 m 4.4× shorter than the brachiosaurus
Eotyrannus is represented here by a selected estimated total length of 5 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 4
Diplodocus Diplodocus carnegii vs Camptosaurus Camptosaurus dispar
Camptosaurus · reference · 5 m Diplodocus · true length · 26 m 5.2× longer than the camptosaurus
Diplodocus is represented here by a selected estimated total length of 26 m. Dinosaur reconstructions vary; this is the source value used for this comparison.
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ROUND 5
Velociraptor Velociraptor mongoliensis vs Carnotaurus Carnotaurus sastrei
Carnotaurus · reference · 8 m Velociraptor · true length · 1.8 m 4.4× shorter than the carnotaurus
Velociraptor is represented here by a selected estimated total length of 1.8 m. Dinosaur reconstructions vary; this is the source value used for this comparison.
Beat these tomorrow
Every round is worth up to 100 points: within 6% of the true size scores 100, half or double scores 45, five times off scores zero. The daily puzzle is the same five for everyone and refreshes at midnight in your time zone; if you want more than five, Size It Up Unlimited draws fresh pairs from the whole library for as long as you like.