ALL ANSWERS · DINOSAURS · DAILY No. 46 · OCTOBER 19, 2026
Size It Up Dinosaurs answer: October 19
The five Dinosaurs silhouettes for October 19, 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 46 ran from a leaellynasaura (2 m) to a mamenchisaurus (22 m). The widest gap was round 1, Leaellynasaura against Deinocheirus, at 5.0×; the closest call was round 3, Dilophosaurus against Huayangosaurus, only 1.6× 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
Leaellynasaura Leaellynasaura amicagraphica vs Deinocheirus Deinocheirus mirificus
Deinocheirus · reference · 10 m Leaellynasaura · true length · 2 m 5.0× shorter than the deinocheirus
Leaellynasaura is represented here by a selected estimated total length of 2 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 2
Psittacosaurus Psittacosaurus mongoliensis vs Iguanodon Iguanodon bernissartensis
Iguanodon · reference · 10 m Psittacosaurus · true length · 2 m 5.0× shorter than the iguanodon
Psittacosaurus is represented here by a selected estimated total length of 2 m. Dinosaur reconstructions vary; this is the source value used for this comparison.
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ROUND 3
Dilophosaurus Dilophosaurus wetherilli vs Huayangosaurus Huayangosaurus taibaii
Huayangosaurus · reference · 4.5 m Dilophosaurus · true length · 7 m 1.6× longer than the huayangosaurus
Dilophosaurus 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 4
Zuniceratops Zuniceratops christopheri vs Therizinosaurus Therizinosaurus cheloniformis
Therizinosaurus · reference · 10 m Zuniceratops · true length · 3.5 m 2.9× shorter than the therizinosaurus
Zuniceratops is represented here by a selected estimated total length of 3.5 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.
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ROUND 5
Chasmosaurus Chasmosaurus belli vs Mamenchisaurus Mamenchisaurus hochuanensis
Mamenchisaurus · reference · 22 m Chasmosaurus · true length · 5 m 4.4× shorter than the mamenchisaurus
Chasmosaurus is represented here by a selected estimated total length of 5 m. Dinosaur reconstructions vary; this is the published estimate 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.