Important note : The default inner diameter is 18.1 mm (Size 8), so if you need it in another size (or material) not listed below please send me a PM, and I will send you the link to the custom size where you can place your order.
Size 9.75 (Inner diameter 19.6 mm)
Size 11.5 (Inner diameter 21 mm)
Size 12 (Inner diameter 21.4 mm)
Size 14 (Inner diameter 23 mm)