These are a great quality. Size up 1 size for that TTS type of fit. If you want it looser so you can layer, I would size up 2 sizes. These are ladies fit and fon't have any stretch to them. If you follow this, then you'll absolutely LOVE them. So 5 stars for me. (Normal Size XL - Wearing a 2XL) Also, If you're purchasing to decorate with HTV, use teflon in between the front/back of shirt to prevent anything from sticking together when you press. There are holes on the torso section so it will adhere to itself if you don't.