They seemed to really like them and found them easy to wear, so they've been worn several times, but I don't think there are any noticeable stains. I think adults could wear them if they are petite. They have an adjustable waist. I bought them at a BREEZE store. Waist (laid flat): Approximately 33cm Rise: Approximately 25cm Inseam: Approximately 68cm My child wore them when they were about 150cm tall. For reference.