Suit jackets, blazers and coats
Men's US sizes for suit jackets, coats and blazers are based on the chest width and your height. When you measure your chest, you should stick a finger between the measuring tape and your body. The result simply equals your jacket size.
Depending on your height, you then have to choose between short (S), regular (R) or long (L).
US letter sizes - XS to XXXL
Use this size table to find out men's clothing sizes in US Letter sizes (Small/Medium/Large). When you've taken your measuremnts, find the size in the table below that corresponds best with your results.
|Men's size standards - US letter sizes|