Size Guide

INTERNAL
DIAMETER
(MM)		 UK US
(YCIENO SIZES)		 EU
13.6 E 2.75 42
14 F 3.25 44
14.9 H 3.75 45
15.1 I 4.5 47
15.5 J 5 48.5
15.9 K 5.5 50
16.3 L 6 51
16.7 M 6.5 52
17.1 N 6.75 53.5
17.5 O 7 55
17.9 P 7.5 56
18.3 Q 8 57
18.8 R 8.5 58.5
19.2 S 9 59.5
19.6 T 9.5 61
19.8 U 10 62.5
20.2 V 10.5 63
20.6 W 11 65