Buying Shoes When Your Feet Are Different Sizes

Two measurements are more useful than one

Nike recommends measuring both feet and using the larger measurement. Take each measurement while standing, following the same procedure and using the same socks. Record right and left length separately; the longer foot is not necessarily also the wider one.

Do not sacrifice the larger foot

Buying for the smaller foot can leave the larger toes pressed against the front or sides. Start with a size and width that accommodate the larger relevant measurements. Then check that the smaller foot does not slide excessively. A size label alone cannot address both problems.

Assess hold on the smaller side

Adjust lacing independently on each shoe and compare how securely each heel sits. If the smaller foot still moves a great deal, a fitter may suggest a different model or an appropriate fitting aid. Do not stack improvised inserts in a way that removes toe space or interferes with prescribed orthotics.

Know when a standard pair is not enough

A substantial difference can require a specialist retailer or split-size service where offered. Availability and cost vary; check directly rather than assuming all brands sell mixed pairs. A new or painful change in foot shape deserves professional assessment rather than a conversion-table workaround.

Before you order

1. Measure left and right heel-to-toe length.
2. Measure width if the chart requires it.
3. Fit the larger foot and check the smaller heel.
4. Seek fitting advice if a normal pair cannot accommodate both.