I have another color of this product in size S, but this one, even though it's also an "S," is smaller and felt tight, so I've only used it a few times. I'm not sure if my other S size is larger or if this black S is smaller, as there might be slight differences depending on the production period (my other S has two rows of hooks in the back). Please refer to images 13 and 14 for the actual size. The design and functionality are very good. I think it's suitable for children or petite, slender adults. Purchase price: ¥3299 - Color: Black - Design: Mesh, 3-row hook in the back - Size: S Thank you for viewing.