Material: Metal Color: Silver Ring Thickness: 14 mm/0.55 inch Ring Dia: 57 mm/2.2 inch Weight:  S: 215 g/0.47 lb/7.5 oz   M: 245 g/0.54 lb/8.6 oz   S  Ball Dia: 25 mm/0.98 inch M Ball Dia: 36 mm/1.4 inch