What's My Suit Size
A. Go get measured, any dry cleaner, tailor, clothing store will do it for free. B. Measure largest part of chest.
Suit jackets come in three lengths: Short, Regular and Long.
The length is determined by your body height and it adjusts for the length of your arms and torso.
5'6" and under
5'7" - 5'11"
6'0" and up