Size Parade

Dinosaur size comparison

T. rex, Brachiosaurus and Argentinosaurus to scale, next to a person, an African elephant and a blue whale. Sizes from natural history museums.

Dinosaur size comparison: the tool

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    Reported heights, each with its source: league, tour and government pages, or the source Wikidata cites. Fan-site guesses are left out. How we pick them.

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        Tyrannosaurus rex skeleton in the Smithsonian National Museum of Natural History
        Photo: USDAgov, public domain, via Wikimedia Commons

        The sizes

        • Argentinosaurus: 35.0 m (115 ft) long, about 20 times an average US man's height (175 cm).
        • Blue whale: 33.5 m (110 ft) long, about 19 times an average US man's height (175 cm).
        • Brachiosaurus: 22.0 m (72 ft) long, about 13 times an average US man's height (175 cm).
        • Tyrannosaurus rex (SUE): 12.3 m (40 ft) long, about 7.1 times an average US man's height (175 cm).
        • African elephant: 4.0 m (13 ft) tall, about 2.3 times an average US man's height (175 cm).

        To picture it

        • Argentinosaurus (35.0 m (115 ft)) is as long as about 20 average US men (175.3 cm) lying head to toe or 7.1 Toyota Camrys (4.9 m (16 ft)) end to end.
        • Blue whale (33.5 m (110 ft)) is as long as about 19 average US men (175.3 cm) lying head to toe or 6.8 Toyota Camrys (4.9 m (16 ft)) end to end.
        • Brachiosaurus (22.0 m (72 ft)) is as long as about 13 average US men (175.3 cm) lying head to toe or 4.5 Toyota Camrys (4.9 m (16 ft)) end to end.
        WhatSizeSource
        Argentinosaurus
        Estimated length from partial fossils.        		35.0 m (115 ft) longNatural History Museum, London
        Blue whale
        Maximum length. Antarctic blue whales reach about 110 ft; in the North Atlantic and North Pacific about 90 ft.        		33.5 m (110 ft) long
        range 27.4 m (90 ft) to 33.5 m (110 ft)        		NOAA Fisheries
        Brachiosaurus
        Estimated length.        		22.0 m (72 ft) longNatural History Museum, London
        Tyrannosaurus rex (SUE)
        SUE, the largest known T. rex specimen: 40.5 ft long, 13 ft tall at the hip.        		12.3 m (40 ft) longField Museum
        African elephant
        Up to 4 m (13 ft) tall.        		4.0 m (13 ft) tallAfrican Wildlife Foundation

        Add anything else from the animal size comparison list on the right, or yourself. More on the animal size comparison page.

        Drawings are to scale on the measured dimension. The other proportions of each silhouette are approximate.

        Questions

        How much bigger is the Argentinosaurus than the blue whale?

        The Argentinosaurus is 35.0 m (115 ft) long and the blue whale is 33.5 m (110 ft), so about 1.0 times as long. Figures from the sources listed below.

        Which is the biggest on this page?

        Argentinosaurus, at 35.0 m (115 ft) long, from Natural History Museum, London.

        How big is the blue whale?

        Sources give 27.4 m (90 ft) to 33.5 m (110 ft). The board uses 33.5 m (110 ft). Maximum length. Antarctic blue whales reach about 110 ft; in the North Atlantic and North Pacific about 90 ft.

        Sources

        1. Field Museum: How well do you know SUE? (checked 2026-10-02)
        2. Natural History Museum, London: Brachiosaurus - Dino Directory (checked 2026-10-02)
        3. Natural History Museum, London: Argentinosaurus - Dino Directory (checked 2026-10-02)
        4. African Wildlife Foundation: Elephant (checked 2026-10-02)
        5. NOAA Fisheries: Blue Whale (checked 2026-10-02)

        Last checked: 5 October 2026