"The Life-link safety harness is available in both adult and child sizes. It features a heavy duty stainless steel interlocking buckle and a D-ring and a fully adjustable black polyester waist webbing. Approved per the latest European standards ISO 12401:2009. - Adult Harness fits chests 70cm to 150cm & >50 Kgr - Child Harness fits chests 60cm to 90cm & 20-50Kgr"