Charcoal Gravity Engineers T-Shirt showing a line drawing of the MkIII 3D printed arm mount.

Sizing:

XS - 31-34 Inches

S - 34-37 Inches

M - 38-41 Inches

L - 42-45 Inches

XL - 46-49 Inches

2XL - 50-53 Inches

3XL - 54-57 Inches