I bought XXL which it says is equivalent to a UK XL. But the sizing info says a UK XL fits a chest 46"-48". Measuring across under the arms the shirt is only 21 inches wide - it would be tight on a 42" chest. This has happened on 3 other Amazon T shirts marked XL - the sizing information is wrong. It's not worth returning them so I'll give them all away.;
Lots of negative criticisms of these tee shirts. They're form fitting. If you're an athletic type then they fit well and have a nice shape. If you're the type who likes baggy then stay clear. The quality isn't designer, neither is the price.