We've received rave reviews! This is partly due to the fact that they are new, unused items at this price, but we also believe it's because they are high-quality products that are widely loved. Sizes can be freely assorted as long as stock is available. 4-piece sets are available in sizes S to 3L. A set of 4 for 7500 yen is cheaper than buying 2, and includes shipping, making it a great deal for those who need them.