This is the second Jinx made shirt I have bought for my husband from Mighty Ape and the size has been excellent. A USA XXXL is much more like a kiwi 6XL so it fits comfortably. It was a nice surprise for hubby today getting it from his lil boys for father's day. If I'm ever looking for another shirt I will search JINX first as most other brands (for men & women) always seem to be far too snug. Along with the Deadpool tee & Starcraft shirt, my husband now has 3 good shirts to wear out and show off.