Fits true to size.
Sizes are US sizes. Order your regular men's blazer or men's suit jacket size.
This jacket comes in 3 lengths designated by the letter R,S or L after the chest size.
R = regular length, typically fine for men between 5'8" - 6'2"
L = long, has an extra ~1.5" in the sleeve for very tall or lanky figures
S = short, sleeves are ~1.5" shorter for shorter or stockier figures