Size It Up

ALL ANSWERS · DINOSAURS · DAILY No. 12 · SEPTEMBER 15, 2026

Size It Up Dinosaurs answer: September 15

The five Dinosaurs silhouettes for September 15, 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 12 ran from a kentrosaurus (5 m) to a therizinosaurus (10 m). The widest gap was round 4, Maiasaura against Camptosaurus, at 1.8×; the closest call was round 1, Carnotaurus against Gigantoraptor, only 1.0× apart — the kind of round that separates a 90 from a 60.

  1. ROUND 1

    Carnotaurus Carnotaurus sastrei vs Gigantoraptor Gigantoraptor erlianensis

    Gigantoraptor · reference · 8 m
    Carnotaurus · true length · 8 m

    1.0× longer than the gigantoraptor

    Carnotaurus is represented here by a selected estimated total length of 8 m. Dinosaur reconstructions vary; this is the source value used for this comparison.

  2. ROUND 2

    Therizinosaurus Therizinosaurus cheloniformis vs Gallimimus Gallimimus bullatus

    Gallimimus · reference · 6 m
    Therizinosaurus · true length · 10 m

    1.7× longer than the gallimimus

    Therizinosaurus is represented here by a selected estimated total length of 10 m. Dinosaur reconstructions vary; this is the source value used for this comparison.

  3. ROUND 3

    Kentrosaurus Kentrosaurus aethiopicus vs Concavenator Concavenator corcovatus

    Concavenator · reference · 6 m
    Kentrosaurus · true length · 5 m

    1.2× shorter than the concavenator

    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.

  4. ROUND 4

    Maiasaura Maiasaura peeblesorum vs Camptosaurus Camptosaurus dispar

    Camptosaurus · reference · 5 m
    Maiasaura · true length · 9 m

    1.8× longer than the camptosaurus

    Maiasaura is represented here by a selected estimated total length of 9 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.

  5. ROUND 5

    Deinocheirus Deinocheirus mirificus vs Centrosaurus Centrosaurus apertus

    Centrosaurus · reference · 6 m
    Deinocheirus · true length · 10 m

    1.7× longer than the centrosaurus

    Deinocheirus is represented here by a selected estimated total length of 10 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.

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