The size is M, but it's a small M. I purchased this in excellent condition and have only worn it twice. Width: 39cm Length: 55cm A comfortable pink short-sleeved T-shirt made of 95% cotton, featuring the adidas TREFOIL design. - Brand: adidas - Color: Pink - Size: M - Material: 95% cotton, 5% polyurethane - Model name: TREFOIL TEE Thank you for looking.