Eddie Bauer Long Sleeve Shirt Button Down 100% Cotton Size S American size, so it's about a size M Please refer to the photos. The material feels very nice against the skin. This brand is hard to find because it stopped being sold in Japan a few years ago. For those who like it... I'm selling it because it doesn't fit anymore. Feel free to ask any questions (*ˊᵕˋ*) Instant purchase is also okay.