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Insole Size Converter

Insole & Orthotic Size Converter — Find Your Insole Size

Find the right insole or orthotic size from your shoe size. Most insoles are trim-to-fit — buy the size range that includes your shoe size, then trim to fit.

Enter your shoe size to find your insole size range.

This insole size converter finds the right insole or orthotic size from your US shoe size for men and women. Most over-the-counter insoles and orthotics come in size ranges (XS, S, M, L, XL) and are designed to be trimmed to fit your exact shoe. Buy the size range that includes your shoe size — then trim using your old insole as a template if needed. Never buy a smaller size and expect it to stretch.

Men's Insole Size Chart

Men's insole sizes by US shoe size (trim-to-fit)
Insole SizeUS Shoe Size
X-Small5–6.5
Small7–8.5
Medium9–10.5
Large11–12.5
X-Large13–14.5

Women's Insole Size Chart

Women's insole sizes by US shoe size
Insole SizeUS Shoe Size
X-Small5–6
Small6.5–8
Medium8.5–10
Large10.5–12

How to Trim Insoles to Fit

  1. Remove the original factory insole from your shoe and lay it flat on top of the new insole.
  2. Trace the outline of the old insole onto the new one with a pen or marker.
  3. Cut along the traced line with scissors. Small nail scissors work well for curved toe areas.
  4. Test in the shoe — it should lie flat with no buckling. Trim any excess if needed.

Frequently Asked Questions

Should I buy a larger or smaller insole when between sizes?
Always buy the larger size. You can trim excess material off, but you cannot add material to an insole that is too small.
Should I remove the original insole?
Yes, in almost all cases. Stacking insoles raises your heel inside the shoe, making it feel tighter and reducing arch support effectiveness.
Do orthotics use the same sizing as regular insoles?
Over-the-counter orthotics follow the same trim-to-fit sizing. Custom orthotics from a podiatrist are made to your exact measurements and do not follow this chart.
How long do insoles last?
Quality foam insoles last 6–12 months with daily use. Gel insoles last longer but compress less. Replace when the material no longer springs back or the arch support has flattened.
Can I use the same insole in different shoes?
Yes — if the shoes are the same size. Re-trim if moving to a different shoe shape, especially if the toe box is significantly wider or narrower.