Women’s Width Sizing Chart
US Women’s Shoe Size Width of Feet (inches)
| Narrow | Average | Wide | Extra-wide | |
| AA | B | C/D | E | |
| 5 | 2.81 | 3.19 | 3.56 | 3.94 |
| 5.5 | 2.87 | 3.25 | 3.62 | 4 |
| 6 | 2.94 | 3.31 | 3.69 | 4.06 |
| 6.5 | 3 | 3.37 | 3.75 | 4.12 |
| 7 | 3.06 | 3.44 | 3.81 | 4.19 |
| 7.5 | 3.12 | 3.5 | 3.87 | |
| 8 | 3.19 | 3.56 | 3.94 | |
| 8.5 | 3.25 | 3.62 | 4 | |
| 9 | 3.37 | 3.69 | 4.06 | |
| 9.5 | 3.37 | 3.75 | 4.12 | |
| 10 | 3.44 | 3.75 | 4.19 | |
| 10.5 | 3.5 | 3.87 | ||
| 11 | 3.56 | 3.94 | ||
| 12 | 3.69 | 4.06 |
Sock aid will work on women with shoe size:
| 5 | Any width |
| 5.5 | Any width |
| 6 | Any width |
| 6.5 | Any width |
| 7 | Any width |
| 7.5 | Only AA, B, C/D |
| 8 | Only AA, B, C/D |
| 8.5 | Only AA, B, C/D |
| 9 | Only AA, B, C/D |
| 9.5 | Only AA, B, C/D |
| 10 | Only AA, B, C/D |
| 10.5 | Only AA, B |
| 11 | Only AA, B |
| 12 | Only AA, B |
Men’s Width Sizing Chart
US Men’s Width of Feet (inches)
| Shoe Size | Narrow | Average | Wide |
| C | D | E | |
| 6 | 3.31 | 3.5 | 3.69 |
| 6.5 | 3.31 | 3.62 | 3.75 |
| 7 | 3.37 | 3.62 | 3.75 |
| 7.5 | 3.37 | 3.69 | 3.94 |
| 8 | 3.5 | 3.75 | 3.94 |
| 8.5 | 3.62 | 3.75 | 4 |
| 9 | 3.62 | 3.94 | 4.12 |
| 9.5 | 3.69 | 3.94 | 4.12 |
| 10 | 3.75 | 4 | 4.19 |
| 10.5 | 3.75 | 4.12 | |
| 11 | 3.94 | 4.12 | |
| 11.5 | 3.94 | 4.19 | |
| 12 | 4 | ||
| 12.5 | 4.12 | ||
| 13 | 4.12 | ||
| 13.5 | 4.18 |
Sock aid will work on men with shoe size:
| 6 | Any width |
| 6.5 | Any width |
| 7 | Any width |
| 7.5 | Any width |
| 8 | Any width |
| 8.5 | Any width |
| 9 | Any width |
| 9.5 | Any width |
| 10 | Any width |
| 10.5 | Only C, D |
| 11 | Only C, D |
| 11.5 | Only C, D |
| 12 | Only C |
| 12.5 | Only C |
| 13 | Only C |
| 13.5 | Only C |
