THE NORTH FACEMen's S/S Simple Dome T-Shirt

In the north face redbox t.shirt is xxl the same as 2xl

My son is an aversge size 14 year old what size should i buy him

is this t-shirt real?

Hi my partner normal a size large but put little weight on so if order a soze xl will it be easy to chance of dont fit ??but will be after xmas that o