This is the cup that came with the Kotori Works bra tank SSS. I haven't used it, so I removed it and stored it from the beginning. I also have M and L, but based on the size markings on the Kotori Works website, I've determined this to be size S. Please understand. There is a possibility that it will be crushed during shipping, but I believe it's an item that will quickly regain its shape. There's one missing, so it's 4 sets + 1 piece. If I find its partner, I'll include it as a bonus and ship them together.