When taking this measurement keep your fist balled up loosely. This measurement will determine the width of the socket so make sure it is comfortable before measuring.


This measurement should also be taken loosely. Measure once with your arm extended all the way and again with your arm flexed. The two measurements will be different. You can either provide both measurements or take a median of the two. This will allow room in the arm for you to flex.


This is a simple loose measurement. It will be used to fabricate the triceps cuff.


This measurement is for the length of the arm. You can choose any length you want but 1" from the inside of the fold works all the time.


This measurement is also for the length of the arm. Any length can be made but 1" from your elbow always works.