It's reeeeally cute (°▽°) It's labeled XS, but I usually wear a size M and it fits me, so I think it'll be fine for those who wear S-M. Since it's an SS product, the fabric is thin and comfortable! In my opinion, underwear wasn't see-through. It's shallow, but there's also a pocket ( ´∀｀) Please make good use of it! *I write this for all my items* I only list items that are in good condition and can be worn without any problems, but there might be small stains or dirt that I've overlooked. Please refrain from making minor complaints, and since it's stored at home, I ask that only those who understand it's a used item please consider purchasing! Thank you for looking.