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🦕 Dinosaur Sizes

Some dinosaurs were taller than a house, and some were as small as a chicken. Meet the giants and the tiny ones, and see how they measure up to you.

lessons

~15 min

to learn

🔬 Science

subject

Ages 6–12

level

Start the course →

What you’ll learn

Big and SmallUnderstand that dinosaurs came in a wide range of sizes and compare them to familiar objects.Dinosaurs came in every size, from ones as small as a chicken to ones longer than three school buses. Comparing them to a bus and a person helps us picture just how big or small each one was.
The GiantsIdentify sauropods as the largest dinosaurs and explain how their bodies were built for size.The largest dinosaurs were the long-necked plant-eaters called sauropods, such as Argentinosaurus, Diplodocus, and Brachiosaurus. Their long necks let them reach high leaves, and some were longer than three buses in a row.
The Small OnesRecognize that many dinosaurs were small, and that birds are today's smallest living dinosaurs.Many dinosaurs were small, like the turkey-sized Compsognathus and pigeon-sized feathered hunters. Birds are living dinosaurs, so the smallest dinosaurs of all are still around us today.

Questions this course answers

Which of these is true about dinosaur sizes?

Dinosaurs came in a huge range of sizes, from ones as small as a chicken to ones bigger than a school bus.

Which dinosaurs were the very biggest?

The long-necked plant-eaters called sauropods, like Argentinosaurus, were the largest dinosaurs.

Why did sauropods have such long necks?

Long necks let sauropods reach leaves at the tops of tall trees, like a giraffe does.

About how big was Compsognathus?

Compsognathus was only about the size of a turkey — one of the smaller dinosaurs.

Which animals alive today are actually the smallest living dinosaurs?

Birds are living dinosaurs, so a tiny sparrow is one of the smallest dinosaurs of all.

Which dinosaur was longer, Diplodocus or Tyrannosaurus?

Diplodocus was about 26 meters long, much longer than the 12-meter Tyrannosaurus.

Grounded in trusted sources

Natural History Museum (London)
Smithsonian's National Museum of Natural History
American Museum of Natural History
Britannica Kids

Every Wunder lesson is built from real, reputable sources — never invented.

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