| US | UK |
|---|---|
| 1/2 | A |
| 3/4 | A-1/2 |
| 1 | B |
| 1 1/4 | B-1/2 |
| 1 1/2 | C |
| 1 3/4 | C-1/2 |
| 2 | D |
| 2 1/4 | D-1/2 |
| 2 1/2 | E |
| 2 3/4 | E-1/2 |
| 3 | F |
| 3 1/4 | F 1/2 |
| 3 2/1 | G |
| 3 3/4 | G 1/2 |
| 4 | H-1/2 |
| 4 1/4 | I |
| 4 2/1 | I-1/2 |
| 4 3/4 | J |
| 5 | J-1/2 |
| 5 1/4 | K |
| 5 1/2 | K-1/2 |
| 5 3/4 | L |
| 6 | L-1/2 |
| 6 1/4 | M |
| 6 1/2 | M-1/2 |
| 6 3/4 | N |
| 7 | O |
| 7 1/4 | O-1/2 |
| 7 1/2 | P |
| 7 3/4 | P-1/2 |
| 8 | Q |
| 8 1/4 | Q-1/2 |
| 8 1/2 | R |
| 8 3/4 | R 1/2 |
| 9 | S |
| 9 1/4 | S-1/2 |
| 9 1/2 | ---- |
| 9 3/4 | T |
| 10 | T-1/2 |
| 10 1/4 | U |
| 10 1/2 | U-1/2 |
| 10 3/4 | V |
| 11 | V-1/2 |
| 11 1/4 | W |
| 11 1/2 | W-1/2 |
| 11 3/4 | X |
| 12 | Y |
| 12 1/4 | Y-1/2 |
| 12 1/2 | Z |
| 12 3/4 | Z-1/2 |
| 13 | ---- |
| 13.25 | Z1 |
| 13 1/2 | ---- |
| 13 3/4 | Z2 |
| 14 | Z3 |