| Size | S | M | L | XL |
|---|---|---|---|---|
| Footplate length (cm)match it to the length of your foot | 25.5 | 27.0 | 29.0 | 29.5 |
| Shoe size (US, men)Aspen's own conversion; it marks 6.5, 9 and 11.5 as borderline between two sizes | 5 – 6.5 | 7 – 9 | 9.5 – 11.5 | 12 – 13.5 |
| Shoe size (US, women)Aspen's own conversion; it lists no extra-large for women | 5.5 – 7.5 | 8 – 10 | 10.5 – 13 | — |
| Height of the orthosis (cm)the brace's own height, not a body measurement | 35.0 | 36.0 | 37.0 | 38.0 |
Aspen sizes the M2 AFO by the length of the foot: take the length that matches yours. The footplate is then trimmed to your own shoe's insole.
Aspen publishes these figures in millimetres and inches; the centimetres are converted.
Aspen's recommended weight limit for the M2 AFO is 100 kg (220 lb).
The shoe sizes are Aspen's own conversion and are a guide: where a shoe runs large or small, the length of the foot decides. The footplate trims by about 2 cm (0.8 in) on average.