These are somewhat larger than expected for the size range given, but can be trimmed down. What can't be adjusted in the placement of the arch support relative to the heel. These insoles have an arch support that is very close to the heel, whereas my arch is a bit farther toward my toes. It may be that folks with very low arches also have their arches closer to the heel and that is the reason for the contour of these insoles. I had to return them