This is a swimsuit from Mizuno's swimming school. The size is XS, and it was used at the swimming school when my child was wearing sizes around 130-140 cm. It's simple, so I think it can be used at elementary school pools as well. There are some cracks and peeling (photos 3 and 4), but overall it's clean and still usable. It has a waist string (photos 7 and 8), so it can be worn without slipping even if it's a little big. The area where the tag was marked with a name has been blacked out.