Both pairs have no noticeable stains. I think I've only worn the light blue pair a few times. The beige pair is size 90, from Nishimatsuya, and the light blue pair is size 95, purchased from a children's clothing store. I generally check items before listing them, but I may miss something. Please check the images carefully and purchase only if you are satisfied. Items with names written on the tags will have the tags cut off or the names marked out with a marker before shipping, but I may miss some. If you have any questions, please comment!