How to Measure for Socket Width
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.
Measuring for Flexibility
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.
Measuring the Triceps Cuff
This is a simple, loose measurement. It will be used to fabricate the triceps cuff.
Measuring the Full Length of the Inner Part of the Arm
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 most of the time.
Measure the Length For the Outer Part of the Arm
This measurement is also for the length of the arm. Any length can be made, but 1" from your elbow works most of the time.