This is a set of a Patagonia short-sleeved rash guard and two swimsuits. (Inner pants can be included if desired.) The rash guard is Patagonia kids' size M (approximately 140cm), and my son wore it when he was 10-11 years old. My son's name is written on the tag of the swimsuits. Please understand that these are used items. Please refrain from purchasing if you are sensitive to used items.