What is the diameter of a 20-40 yr old's finger?

Question

i'm doing my gcse coursework and need this information as i cannot find any anthropometric data on the internet. please help asap.

Answer 1

Did you measure your finger? I got 5.5 cm for my index finger's circumference. That yields a diameter of 1.76 cm. Thumb is more, pinky is less

It would also vary from person to person, depending upon age and build, and females on average would be smaller than males.