2 doctors weighed in:

Can having a pronation of the foot or flat feet cause differing foot sizes?

2 doctors weighed in
Dr. Eric Bluman
Orthopedic Surgery - Foot & Ankle
1 doctor agrees

In brief: Yes

As your foot becomes flatter your arch drops and the foot becomes longer. If there is a difference in how much arch height is lost between your feet you may start to have different shoe sizes.

In brief: Yes

As your foot becomes flatter your arch drops and the foot becomes longer. If there is a difference in how much arch height is lost between your feet you may start to have different shoe sizes.
Dr. Eric Bluman
Dr. Eric Bluman
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Dr. Warren Strudwick
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