To calculate body frame size, it is enough for you to measure the person's height accurately. Then you need to measure the person's wrist circumference. Divide the height by the wrist circumference and put it in the table below to determine the person's bone structure.
Table to evaluating:
For men:
Body frame index
Body frame size
r > 10.4
Small frame
r = 9.6-10.4
Medium frame
r < 9.6
Large frame
For women:
r > 11
r = 10.1-11.0
r < 10.1
Formula
Body frame size = Height / Wrist circumference
Apply the following online tools
https://dailytn.com/ask/frame