Review on Soccer Tee Shirt Silhouette Athletic by Tommy Maynard

I liked the t-shirt but it's too big. I will be returning this and reordering in a small one. I would like to exchange it, but I can't find how to do it. It would be better if the buyer provided actual measurements and not just S, M or L. When ordering I didn't know how this size would fit an 11 year old girl. If the actual #ed size had been listed I wouldn't have had to send it back and order again.