I had custom-made matching t-shirts made for a trip with friends. I enlarged the print images slightly during the design draft for sizes S, M, L, and XL to produce different sizes, but they look a bit small... I guess I should have increased the print size a bit more. Also, the colors came out a little lighter than they appeared in the design draft. That is a bit disappointing, but I am satisfied with everything else. I wear a size 90 top and usually wear a size M (I'm a size 55.5 body type). Since it was described as an oversized short-sleeved fit, I ordered a size S, and it fits well. I think the M size would have been a bit too big.