Size It Up

ALL ANSWERS · DINOSAURS · DAILY No. 8 · SEPTEMBER 11, 2026

Size It Up Dinosaurs answer: September 11

The five Dinosaurs silhouettes for September 11, 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 8 ran from a chasmosaurus (5 m) to a diplodocus (26 m). The widest gap was round 2, Yangchuanosaurus against Diplodocus, at 2.6×; the closest call was round 4, Ankylosaurus against Carnotaurus, only 1.0× apart — the kind of round that separates a 90 from a 60.

  1. ROUND 1

    Styracosaurus Styracosaurus albertensis vs Deinocheirus Deinocheirus mirificus

    Deinocheirus · reference · 10 m
    Styracosaurus · true length · 5.5 m

    1.8× shorter than the deinocheirus

    Styracosaurus is represented here by a selected estimated total length of 5.5 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.

  2. ROUND 2

    Yangchuanosaurus Yangchuanosaurus shangyouensis vs Diplodocus Diplodocus carnegii

    Diplodocus · reference · 26 m
    Yangchuanosaurus · true length · 10 m

    2.6× shorter than the diplodocus

    Yangchuanosaurus is represented here by a selected estimated total length of 10 m. Dinosaur reconstructions vary; this is the published estimate used for this comparison.

  3. ROUND 3

    Chasmosaurus Chasmosaurus belli vs Allosaurus Allosaurus fragilis

    Allosaurus · reference · 9.7 m
    Chasmosaurus · true length · 5 m

    1.9× shorter than the allosaurus

    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.

  4. ROUND 4

    Ankylosaurus Ankylosaurus magniventris vs Carnotaurus Carnotaurus sastrei

    Carnotaurus · reference · 8 m
    Ankylosaurus · true length · 8 m

    1.0× longer than the carnotaurus

    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.

  5. ROUND 5

    Torvosaurus Torvosaurus tanneri vs Gigantoraptor Gigantoraptor erlianensis

    Gigantoraptor · reference · 8 m
    Torvosaurus · true length · 10 m

    1.3× longer than the gigantoraptor

    Torvosaurus 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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