Gauge Index

Gauge	O.D. in mm	I.D. in mm
26	0.45	0.25
26s	0.47	0.13
25	0.50	0.28
24	0.55	0.32
23	0.64	0.35
23s	0.64	0.15
22	0.72	0.40
22s	0.72	0.20
21	0.80	0.50
20	0.90	0.60
19	1.10	0.80