INTERNAL DIAMETER (MM)

15 I UK H I US 4 I GERMANY 47 I FRANCE 46.6 I ITALY 7

15.3 I UK I I US 4.5 I GERMANY 48 I FRANCE 48 I ITALY 8

15.6 I UK J I US 5 I GERMANY 49 I FRANCE 49.5 I ITALY 9

16.2 I UK K I US 5.5 I GERMANY 51 I FRANCE 50.5 I ITALY 10

16.6 I UK L I US 6 I GERMANY 52 I FRANCE 52 I ITALY 11

16.9 I UK M I US 6.5 I GERMANY 53 I FRANCE 53 I ITALY 12.5

17.2 I UK N I US 7 I GERMANY 54 I FRANCE 54.5 I ITALY 14

17.8 I UK O I US 7.5 I GERMANY 56 I FRANCE 55.5 I ITALY 15

18.1 I UK P I US 8 I GERMANY 57 I FRANCE 57 I ITALY 16

18.5 I UK Q I US 8.5 I GERMANY 58 I GERMANY 58 I ITALY 17.5

UK 6 l ITALY 38 l FRANCE 34 l JAPAN 1 l USA 2

UK 8 l ITALY 40 l FRANCE 36 l JAPAN 2 l USA 4

UK 10 l ITALY 42 l FRANCE 38 l JAPAN 3 l USA 6

UK 12 l ITALY 44 l FRANCE 40 l JAPAN 4 l USA 8

UK 14 l ITALY 46 l FRANCE 42 l JAPAN l USA 10

UK 16 l ITALY 48 l FRANCE 44 l JAPAN l USA 12

UK 4 l ITALY 37 l USA 6.5

UK 5 l ITALY 38 l USA 7.5

UK 6 l ITALY 39 l USA 8.5

UK 7 l ITALY 40 l USA 9.5

UK 8 l ITALY 41 l USA 10.5

All noted conversions are for guidance only, we cannot accept any liability for errors made when compiling the tables.