Size It Up

ALL ANSWERS · DINOSAURS · DAILY No. 4 · SEPTEMBER 7, 2026

Size It Up Dinosaurs answer: September 7

The five Dinosaurs silhouettes for September 7, 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 4 ran from a gallimimus (6 m) to a brontosaurus (22 m). The widest gap was round 3, Parasaurolophus against Brontosaurus, at 2.4×; the closest call was round 2, Iguanodon against Gallimimus, only 1.7× apart — the kind of round that separates a 90 from a 60.

  1. ROUND 1

    Spinosaurus Spinosaurus aegyptiacus vs Carnotaurus Carnotaurus sastrei

    Carnotaurus · reference · 8 m
    Spinosaurus · true length · 14 m

    1.8× longer than the carnotaurus

    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.

  2. ROUND 2

    Iguanodon Iguanodon bernissartensis vs Gallimimus Gallimimus bullatus

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

    1.7× longer than the gallimimus

    Iguanodon 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

    Parasaurolophus Parasaurolophus walkeri vs Brontosaurus Brontosaurus excelsus

    Brontosaurus · reference · 22 m
    Parasaurolophus · true length · 9 m

    2.4× shorter than the brontosaurus

    Parasaurolophus is represented here by a selected estimated total length of 9 m. Dinosaur reconstructions vary; this is the source value used for this comparison.

  4. ROUND 4

    Allosaurus Allosaurus fragilis vs Brachiosaurus Brachiosaurus altithorax

    Brachiosaurus · reference · 22 m
    Allosaurus · true length · 9.7 m

    2.3× shorter than the brachiosaurus

    Allosaurus is represented here by a selected estimated total length of 9.7 m. Dinosaur reconstructions vary; this is the source value used for this comparison.

  5. ROUND 5

    Apatosaurus Apatosaurus louisae vs Stegosaurus Stegosaurus stenops

    Stegosaurus · reference · 9 m
    Apatosaurus · true length · 21 m

    2.3× longer than the stegosaurus

    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.

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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