We have 3 main brands For T-Shirts and 3 main brands for Polo collar shirts
These sizes below are the standard sizes for all the shirts.
The measurements are taken from armpit to armpit facing forward (Not around)
XS - L=38cm H=55cm
S - L=42cm H=62cm
M - L=44cm H=64cm
ML - L=48cm H=66cm
L - L=52cm H=74cm
XL - L=54cm H=76cm
XXL - L=58cm H=78cm
XXXL - L=62cm H=82cm