Material: Metal Color: Silver Ring Thickness: 25 mm/0.55 inch Ring Dia: 57 mm/2.2 inch Weight:  S: 300 g/0.66 lb/10.5 oz   M: 400 g/0.88 lb/14.1 oz   S  Ball Dia: 25 mm/0.98 inch M Ball Dia: 36 mm/1.4 inch