Powerstep Insole Size Guide
Orthotic insoles by shoe size · Full-length ASM–L · 3/4 length · SlenderFit
Find your Powerstep insole size with Powerstep’s official sizing charts — or bring your shoes to our Kettering, Ohio store and we’ll fit your insoles.
How it fits
Powerstep insoles are sized by your US shoe size. Each size covers a range (for example, size C fits men’s 6–6½ and women’s 8–8½). Full-length, 3/4-length and SlenderFit insoles use different charts — match the chart to the insole.
If you need to trim, Powerstep recommends using your shoe’s factory insole as a template.
Break them in gradually: Powerstep recommends wearing new orthotics for up to one hour on the first day (30 minutes at a time if your feet are sensitive).
Full-length insoles (Pinnacle, Original, Pinnacle Maxx, Pinnacle Plus, Pinnacle Low, Pinnacle High, PULSE)
| Powerstep size | Men’s shoe | Women’s shoe |
|---|---|---|
| ASM | 3–3½ | 5–5½ |
| A | 4–4½ | 6–6½ |
| B | 5–5½ | 7–7½ |
| C | 6–6½ | 8–8½ |
| D | 7–7½ | 9–9½ |
| E | 8–8½ | 10–10½ |
| F | 9–9½ | 11–11½ |
| G | 10–10½ | 12 |
| H | 11–11½ | — |
| I/J | 12–13 | — |
| K | 14–15 | — |
| L | 16+ | — |
Full-length chart applies to most Powerstep full-length insoles. Not every style comes in every size.
3/4-length insoles
| Powerstep size | Men’s shoe | Women’s shoe |
|---|---|---|
| ASM | 4–4½ | 6–6½ |
| A | 5–6½ | 7–8½ |
| B | 7–8½ | 9–10½ |
| C | 9–9½ | 11–11½ |
| D | 10–10½ | 12 |
| E | 11–11½ | — |
| F | 12–13½ | — |
SlenderFit (women’s)
| Powerstep size | Women’s shoe |
|---|---|
| XS | 5–6 |
| SM | 6½–7½ |
| MD | 8–9 |
| LG | 9½–10½ |
Our SlimTech 3/4 insoles use the 3/4-length sizes. SlenderFit is designed for women’s slim-fitting and heeled shoes.
Archwear sandals
Powerstep Archwear sandals are sold in your regular US shoe size; we carry them in whole sizes.
Need help? We measure every customer with a Brannock device at our Kettering store. Stop in for a fitting, or call us at 937.298.1801 and we’ll help you choose. Ready to shop? Shop all Powerstep →
Source: Powerstep sizing chart reference and FAQ (powerstep.com) · Last checked October 2026