How-to

Fit Replacement Sneaker Insoles in Six Steps Before Trimming

Do not trim replacement insoles by size alone. Compare Superfeet's official trimming video with SOLE's fitting instructions: align the heel, trace the toe end, trim gradually and test inside the shoe.

6 min read2026-10-26

Official 2018 Superfeet demonstration; follow each maker's instructions for other insoles.

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OriginalSuperfeet product-specific trimming guideSuperfeet Official FAQ

OriginalSOLE's factory-insole tracing and cutting guideSOLE Official FAQ

Your style checklist

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01

What you need

Shoes with removable factory insoles
Replacement inserts and product instructions
Original factory insoles
Sharp scissors and the socks you wear

02

How to

1. Check whether the original footbed lifts out of the shoe. This guide is for ordinary footwear with removable factory insoles; glued-in beds and prescription orthotics need the manufacturer's or clinician's instructions.
2. Read the replacement insole's instructions for shoe compatibility, size range and whether trimming is allowed. Compare thickness and volume as well as length: a high-volume insert may reduce room over the instep.
3. Remove the factory insole carefully and place it over the new insert. Align the heel ends first, then mark the toe outline. Follow any specific cutting or marking directions from the replacement maker.
4. If the product permits trimming, cut small amounts from the toe end and test inside the shoe. Superfeet advises approximately 1–2 mm of clearance on its products, not as a universal rule for every brand.
5. Wear your usual socks and test one insert per shoe while standing and walking a short distance. Check heel seating, toe room and pressure over the instep. Do not casually stack it on top of the existing insole.
6. Compare the feel on both sides and begin with short wear before a long walk. Stop if pain or numbness develops. Lift inserts out periodically to air trapped moisture and inspect for wear.

One more tip

Trim only insoles that their maker says can be cut. Do not cut glued-in shoe beds or prescription orthotics without professional advice. Stop wearing an insert that causes pain or numbness and seek qualified advice.

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