ALL ANSWERS · DINOSAURS · DAILY No. 40 · OCTOBER 13, 2026
Size It Up Dinosaurs answer: October 13
The five Dinosaurs silhouettes for October 13, 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 40 ran from a protoceratops (1.8 m) to a diplodocus (26 m). The widest gap was round 3, Protoceratops against Triceratops, at 5.0×; the closest call was round 4, Ankylosaurus against Corythosaurus, only 1.3× 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
Plateosaurus Plateosaurus vs Torvosaurus Torvosaurus tanneri
Torvosaurus · reference · 10 m Plateosaurus · true length · 7 m 1.4× shorter than the torvosaurus
Plateosaurus is represented here by a selected estimated total length of 7 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 2
Kentrosaurus Kentrosaurus aethiopicus vs Maiasaura Maiasaura peeblesorum
Maiasaura · reference · 9 m Kentrosaurus · true length · 5 m 1.8× shorter than the maiasaura
Kentrosaurus 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 3
Protoceratops Protoceratops andrewsi vs Triceratops Triceratops horridus
Triceratops · reference · 9 m Protoceratops · true length · 1.8 m 5.0× shorter than the triceratops
Protoceratops 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.
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ROUND 4
Ankylosaurus Ankylosaurus magniventris vs Corythosaurus Corythosaurus casuarius
Corythosaurus · reference · 10 m Ankylosaurus · true length · 8 m 1.3× shorter than the corythosaurus
Ankylosaurus is represented here by a selected estimated total length of 8 m. Dinosaur reconstructions vary; this is the source value used for this comparison.
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ROUND 5
Spinosaurus Spinosaurus aegyptiacus vs Diplodocus Diplodocus carnegii
Diplodocus · reference · 26 m Spinosaurus · true length · 14 m 1.9× shorter than the diplodocus
Spinosaurus is represented here by a selected estimated total length of 14 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.