What diaper size is a 12 year old?

Typically, a 12-year-old would not wear diapers, as they are considered a product for infants and toddlers. However, in cases of special needs or medical conditions, some older children may require adult-sized diapers. The sizing for adult diapers varies, so it would depend on the individual’s waist measurement rather than a standard size like those for babies. It's best to refer to specific product sizing charts for accurate fitting.