Purchased new at Akachan Honpo last year. This is a set of 5 long underwear and 3 short underwear. Size: 50-60 There are a few noticeable stains around the neck from milk spit-up, although they are not very prominent. I washed them with baby detergent every time, but they didn't come out. Please check the photos. I only used baby detergent for washing. I used them in rotation for about a month. They show signs of wear, but they can still be worn!