Thank you for viewing. I'm selling this because I've worn it twice, but the size was a little too big for me. It's a size M. Please refer to the official size chart in the fifth image for details. Please refrain from purchasing if you are sensitive to items stored by a non-professional. If that's not a problem, please consider buying. Here's the information: Set of 2, black and white Product Name: USA Cotton 2-Way Back Shirring Long Sleeve T-shirt Retail Price: 2,970 yen per piece Material: 95% cotton, 5% polyurethane