■ Genuine Tortoise Shell Top White Shell Ring - 32 (No. 15, 5) ★ Front Height 0.8 inch (20 mm) Width 0.6 inch (16 mm) Thickness 0.2 inch (6.5 mm) ★ Stock Number (No. 14, 5, 15, 5) ◎ Please choose the size up your K18 size. Comes with a tortoise shell warranty.