Rings

Lines & Current
 
* Note Della Drip Rings, Rain Open Rings & Nova thick cut ring all have an opened back which can be slightly adjusted to fit *
Size mm UK US
16mm L 5 1/2
17mm N 1/2 6 3/4 
18mm P 1/2 7 3/4
19mm R 1/2 9
20mm U 1/2 10 1/4