Depending on the product and its cut, the sizes in cm are specified below
A : chest / bust width (chest height, under the arms)
B : chest / bust height (bottom of jersey - top of shoulder / collar base)
C : sleeve length (from collar base to bottom of wrist band)
Take your measurements, or the those of your favorite tee-shirt, LAID FLAT,
and select the size (from MD to 2XL) with the closest match :
Warning : DESERTECH jersey's cut is loose, so you can wear a chest protector under !
if you don't wear such protections ( trials...) you should wear one size below your standard : check mesures hereafter, it's reliable !