Model is 5' 9" and wearing a size XS.
The Milo Jacket runs true to size.
XS | 20 1/2" length | 18" chest | 23 3/4" sleeve length | 18" bottom
S | 21" length | 19" chest | 24 1/4" sleeve length | 19" bottom
M | 21 1/2" length | 20" chest | 24 3/4" sleeve length | 20" bottom
L | 22" length | 21" chest | 25 1/4" sleeve length | 21" bottom