Material: Metal Color: Silver Size: 9.3 * 3.3 cm/3.6 * 1.3 inch The diameter of the ball ring have 3 Size: 36 mm/1.4 inch (S) 38 mm/1.5 inch (M) 40 mm/1.6 inch (L) 42 mm/1.7 inch (XL) 45 mm/1.8 inch (XXL)