Xplicit brand sizes are designed to fit to the following body measurements:

SIZE TO FIT CHEST SIZE
INCHES CM
S 36-38 91-96
M 38-40 96-101
L 40-42 101-106
XL 42-44 106-111
XXL 44-46 111-116

Lengths of Xplicit T-shirt & polo shirts will vary from style to style, however the average length of a size M top measures 27.5 inches / 70cm down centre back from collar to hem.