This is a setup I bought a few years ago. I'm selling it because my style has changed. It's 100% cotton and very comfortable to wear! The outer is M The bottoms are L *The bottoms may be a bit narrow in the waist, so I think even those who wear M size won't have them fall down. Because it's white, it's easy to have fun with the colors of your innerwear, shoes, and hat(^^) Please feel free to ask if you have any other questions. Also, I am pregnant, so my replies may be delayed. Thank you for your understanding.