Variable: There is no specific length for your coccyx (or tailbone). There are many variations with abnormal fusions and failure of segmentation segments. There is such a thing as a congenital tail that people will have a small protrusion representing a smal vestigial tail.
Answered 10/23/2017
5.3k views
See below: Most "tailbones" are a few inches long although there can be lots of variability between different individuals
Answered 7/4/2017
635 views
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