Style: Retro / Vintage / Motorcycle / Biker. 46 (S), but it fits more like a slim M(see measurements). With Jacket Laying Flat (compare them to a jacket you own). Chest: 21 - 21.5.Back (from bottom of collar): 28 - 28.5. Arm (from armpit to sleeve): 19 - 19.5. Keywords: barbour, belstaff, stone island, all saints, jcrew, banana republic, ralph lauren, italian, british, cp company, moncler, merlin, schott, england, british, uk, t.