I've bought this before in red in a size M, it fitted well and it's stretchy but it was too tight and short for my comfort, specially after eating lol.. So this time I got a XL and it sits very comfortable, slightly loose, at the back as well, while mantaining a nice shape and also the lenght is perfect for me. So be aware of that depending on the fit you want. I always wanted these lower back shirts but they are mostly too tight so the secret is going up in size. Now it's perfect!