Adidas by Stella McCartney compression T-shirt, worn once. I purchased this to match a sports bra I'm also selling (bought around the same time, but the series is different, so the colors are slightly different). I can't find a size tag, but I may have removed it because it interfered with the mesh. I usually wear a size M, so I think this is a Japanese size M, but it might be a size S in overseas sizes. Measured by hand, the width under the armpits is about 40 cm when laid flat, and the waist mesh area is about 30 cm, a compression shirt with a beautiful line. It stretches well because it's 20% polyurethane. As stated in the comments, the last image was taken for reference of transparency, so the sports bra is not included, only the T-shirt itself is for sale. It will match anything you have, even if it's not the same color. I bought it for yoga, but I don't know if it's originally tennis wear or amphibious wear. It's a high-end item, so it's best to wash it in a laundry net. Please make your judgment based on the images, and please refrain from purchasing if you are sensitive to used items. The hanger used for the photos is not included.