Never worn, though the tags have been removed. The fabric feels like a cotton-silk blend, giving it the feel of an elevated white T-shirt if it fits just right. It’s slightly oversized for someone who is 5'2" and 110 lbs, typically a size 00 or XXS With a 50 cm (about 19.7 inches) underarm measurement shown in the picture. I kept it for so long without wearing because the fabric is really nice. This is size small.