I think the white ones were used about 8 times, and the yellow ones about 2 times. The Velcro is convenient, and I think you can go out cutely with just this undershirt. It was useful for babies in the early months with frequent diaper changes ☺︎ I didn't use them very often because I had a lot of undershirts. Please forgive me as this is a personal check, but as far as I can see, there is a feeling of use from washing, but there are no noticeable stains and the condition is good. Size is 50-60. I bought it at a department store for the regular price of 5500 yen ☺︎ This is a used item, so please refrain from purchasing if you are looking for a perfect item.