ALL ANSWERS · DINOSAURS · DAILY No. 49 · OCTOBER 22, 2026
Size It Up Dinosaurs answer: October 22
The five Dinosaurs silhouettes for October 22, 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 49 ran from a heterodontosaurus (1.2 m) to a mamenchisaurus (22 m). The widest gap was round 3, Heterodontosaurus against Deinocheirus, at 8.3×; the closest call was round 1, Yangchuanosaurus against Tenontosaurus, 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
Yangchuanosaurus Yangchuanosaurus shangyouensis vs Tenontosaurus Tenontosaurus tilletti
Tenontosaurus · reference · 7 m Yangchuanosaurus · true length · 10 m 1.4× longer than the tenontosaurus
Yangchuanosaurus is represented here by a selected estimated total length of 10 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 2
Mamenchisaurus Mamenchisaurus hochuanensis vs Tyrannosaurus rex Tyrannosaurus rex
Tyrannosaurus rex · reference · 12 m Mamenchisaurus · true length · 22 m 1.8× longer than the tyrannosaurus rex
Mamenchisaurus is represented here by a selected estimated total length of 22 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 3
Heterodontosaurus Heterodontosaurus tucki vs Deinocheirus Deinocheirus mirificus
Deinocheirus · reference · 10 m Heterodontosaurus · true length · 1.2 m 8.3× shorter than the deinocheirus
Heterodontosaurus is represented here by a selected estimated total length of 1.2 m. This is the museum directory estimate used for this comparison; individual animals and reconstructions vary.
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ROUND 4
Beipiaosaurus Beipiaosaurus inexpectus vs Deinonychus Deinonychus antirrhopus
Deinonychus · reference · 3.4 m Beipiaosaurus · true length · 2 m 1.7× shorter than the deinonychus
Beipiaosaurus is represented here by a selected estimated total length of 2 m. This is the museum directory estimate used for this comparison; individual animals and reconstructions vary.
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ROUND 5
Ceratosaurus Ceratosaurus nasicornis vs Giganotosaurus Giganotosaurus carolinii
Giganotosaurus · reference · 13 m Ceratosaurus · true length · 7 m 1.9× shorter than the giganotosaurus
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.
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.