Size It Up

ALL ANSWERS · DINOSAURS · DAILY No. 11 · SEPTEMBER 14, 2026

Size It Up Dinosaurs answer: September 14

The five Dinosaurs silhouettes for September 14, 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 11 ran from a styracosaurus (5.5 m) to a mamenchisaurus (22 m). The widest gap was round 4, Mamenchisaurus against Styracosaurus, at 4.0×; the closest call was round 2, Albertosaurus against Corythosaurus, only 1.1× apart — the kind of round that separates a 90 from a 60.

  1. ROUND 1

    Abelisaurus Abelisaurus comahuensis vs Acrocanthosaurus Acrocanthosaurus atokensis

    Acrocanthosaurus · reference · 12 m
    Abelisaurus · true length · 9 m

    1.3× shorter than the acrocanthosaurus

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

  2. ROUND 2

    Albertosaurus Albertosaurus sarcophagus vs Corythosaurus Corythosaurus casuarius

    Corythosaurus · reference · 10 m
    Albertosaurus · true length · 9 m

    1.1× shorter than the corythosaurus

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

  3. ROUND 3

    Apatosaurus Apatosaurus louisae vs Allosaurus Allosaurus fragilis

    Allosaurus · reference · 9.7 m
    Apatosaurus · true length · 21 m

    2.2× longer than the allosaurus

    Apatosaurus is represented here by a selected estimated total length of 21 m. Dinosaur reconstructions vary; this is the source value used for this comparison.

  4. ROUND 4

    Mamenchisaurus Mamenchisaurus hochuanensis vs Styracosaurus Styracosaurus albertensis

    Styracosaurus · reference · 5.5 m
    Mamenchisaurus · true length · 22 m

    4.0× longer than the styracosaurus

    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.

  5. ROUND 5

    Spinosaurus Spinosaurus aegyptiacus vs Ceratosaurus Ceratosaurus nasicornis

    Ceratosaurus · reference · 7 m
    Spinosaurus · true length · 14 m

    2.0× longer than the ceratosaurus

    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.

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