There is no industry standard for footwear sizes. For example, a size 8 by one footwear manufacturer might be different from a size 8 produced by another. That's why Superfeet makes full-length insoles in size ranges (typically spanning 1.5 sizes) to handle the variations. You may need to trim your insoles to fit in your footwear.
What to Look for a Proper Superfeet Fit:
- Check if your heel fits inside the Superfeet heel cup, and not over the edge.
- If either the heel cup or the insole is too narrow, go up a letter - size.
- If your toes extend beyond the end of the foam forefoot, go up a letter - size.
Trimming & Fitting Superfeet Full-Length Insoles:
Video - Sizing your insole:
Video - Trimming and fitting your Superfeet: