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|
US,
Canada
|
IRE, UK, AUS
|
Inside Diameter (mm)
|
Circumference (mm)
|
|
3
|
F
|
14.1
|
44.2
|
|
3.5
|
G
|
14.5
|
45.4
|
|
4
|
H
|
14.9
|
46.7
|
|
4.5
|
I
|
15.3
|
48
|
| 5 | J | 15.7 | 49.3 |
| 5.5 | K | 16.1 | 50.6 |
| 6 | L | 16.5 | 51.9 |
| 6.5 | M | 16.9 | 53.2 |
| 7 | N | 17.3 | 54.5 |
| 7.5 | O | 17.7 | 55.8 |
| 8 | P | 18.2 | 57.2 |
| 8.5 | Q | 18.5 | 58.2 |
| 9 | R | 18.9 | 59.3 |
| 9.5 | S | 19.4 | 61 |
| 10 | T | 19.8 | 62.3 |
| 10.5 | U | 20.2 | 63.5 |
| 11 | V | 20.7 | 65 |
| 11.5 | W | 21.1 | 66.2 |
| 12 | X | 21.5 | 67.5 |
| 12.5 | Y | 21.9 | 68.8 |
| 13 | Z | 22.3 | 70.2 |
| 14 | Z + 2 | 22.7 | 71.3 |