Adjustable, in-line skates, outdoor rollerskates for girls and boys. Medium tag it will fit 88-year-old nine-year-old and 10-year-old supposed to be adjustable in sizes so it couldn’t possibly fit small also but not large it’s four size adjustable medium would fit four sizes in the medium range, which is from 34 to 38 European size which would be basically, 15.5–6 it’s durable and comfortable has reinforced titanium steel frame, high speed, mute bearings, the safety, cam lever buckle power strap laces up closure system helps fasten the feet properly into the skate