This is a silk T-shirt from theory luxe. The size is 38, which I think is about S-M. Please check the detailed size in the photos. I've worn it a few times, and there's a small line-like mark on the chest. Please check the photos before considering purchasing. That's why I've priced it low. The material is 100% silk. I will fold it compactly for shipping. Please consider this before purchasing. The following is from Mercari AI: Lightweight red short-sleeved T-shirt, simple and easy to wear design. - Brand: theory luxe - Color: Red - Style: Short sleeve - Material: Lightweight material Thank you for viewing. theory theory luxe