About what size is the tailbone (coccyx)?

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Answer 1 · 2016-08-09T18:26:24

Coccyxes vary in size from 3 cm to 10 cm.

The coccyx (Greek kokkux = "cuckoo") is at the end of the spine.

It consists of three to five vertebrae fused together, with a length ranging from 3 cm to 10 cm.

The coccyx is shaped like a triangle and is curved like a cuckoo's beak.

Here's a picture of a yellow-billed cuckoo (I flipped and rotated it for comparison).