How to measure your foot width

Foot width is measured across the ball of the foot, the widest point

Standing with weight evenly on the foot, wrap a tape or lay a ruler across the ball of the foot — the widest point, just behind the toes — perpendicular to the foot's length, and read that measurement in either inches or centimetres to compare against a specific shoe brand's width chart.

Measure standing, the same way as foot length

Just as foot length changes under load, foot width also spreads slightly when weight-bearing compared with sitting relaxed, so measure standing for the same reason and with the same reasoning covered on the foot-length guide elsewhere on this site.

Width letters (narrow, medium, wide) aren't standardized identically across brands

Unlike length, which converts fairly consistently via the shoe charts on this site, width designations like narrow, medium, and wide are applied somewhat differently by each shoe brand and manufacturer, so a "wide" from one brand and a "wide" from another can represent genuinely different actual millimetre measurements — checking a specific brand's own width chart, where published, is more reliable than assuming width letters transfer identically across brands.

Width matters more for some shoe categories than others

A structured leather dress shoe or hiking boot, with limited stretch and a defined shape, is considerably less forgiving of an incorrect width than a stretchy athletic shoe or sandal with adjustable straps, so checking width specifically matters more before a structured-shoe purchase than before a flexible, adjustable one.

Measure both feet, since width can differ between them too

Similar to foot length, width can differ slightly between your left and right foot, so measuring both and using the wider measurement when converting a size avoids ordering a shoe that's uncomfortably tight across the ball of your wider foot.

A too-narrow shoe is a common, avoidable cause of foot discomfort

Because length gets most of the attention in shoe sizing, a shoe that's the correct length but genuinely too narrow for your foot is a common and often misdiagnosed source of discomfort, sometimes wrongly blamed on length alone when width was the actual issue — checking width explicitly, not just assuming a correct length solves everything, catches this.

Measure in the evening, alongside your length measurement

As with length, feet widen slightly by evening from a day of standing and walking, so taking your width measurement at the same time as your evening length measurement gives a consistent, representative pair of figures to convert together.

Different brands within the same region can still vary in actual width shape

Beyond the general narrow/medium/wide labels, the actual last shape — how a shoe is built around the foot's overall volume, not just the ball-of-foot width — varies by brand's own design philosophy, so a correctly converted width designation from one brand doesn't guarantee an identical fit from a different brand in the same country's sizing system.

Kids' foot width changes proportionally faster than adult width

Children's feet, especially in early growth years, can change in width proportion as well as length within a single growth phase, so checking width alongside length each season for a growing child matters more than it does for an adult, whose foot width is comparatively stable once fully grown.

A too-wide shoe compensated for with thick socks isn't a real fix

Wearing thicker socks to compensate for a shoe that's actually too wide across the ball of the foot addresses only part of the fit problem, since the sock adds bulk without changing the structural shape the shoe was built around — checking width directly against the correct chart is more reliable than trying to sock-pad around a genuinely wrong width.

Recording foot width alongside length keeps a complete shoe-shopping reference

Because most international shoe conversions on this site rely primarily on length, keeping your width measurement noted alongside it — rather than as a separate, easily forgotten figure — makes checking a specific brand's own width-inclusive chart faster when one is available.

Swelling conditions and edema-related width changes need their own specific approach

For anyone dealing with foot swelling from medical conditions, pregnancy, or long-haul travel, measuring width at a time representative of when the shoe will actually be worn, and considering an adjustable or extra-wide style specifically, is more useful than trying to fit a standard-width shoe to a foot that varies significantly through the day.

A tracing gives more visual information than a single width number alone

Beyond a single ball-of-foot width measurement, tracing the full outline of your foot the way described on the foot-length guide gives a fuller visual picture of your foot's overall shape — whether it tapers sharply toward the toes or stays broad — information a single width figure alone doesn't fully capture.

Width matters differently for open-toe and closed-toe styles

An open-toe sandal exposes the sides of the foot rather than enclosing them, so a slightly wide foot has more visual and physical tolerance in this style than in a fully enclosed shoe where the upper material has to accommodate the full width without any give at the edges.

A shoe's insole shape sometimes accommodates width differently than the upper suggests

Occasionally a shoe with a narrow-looking upper actually has a more generously shaped insole and toe box than its silhouette suggests, or vice versa, so trying a specific model when possible — rather than judging width purely from a product photo — catches this discrepancy between visual narrowness and actual internal room.

Recording the date alongside your width measurement helps track genuine change

Foot width drifts far more slowly than length usually does, but pregnancy and a significant weight change can still spread it out gradually over the years — jot the date down next to the figure, so a fit complaint down the line has an actual measurement to check against instead of a guess about when it was last taken.

A width mismatch is sometimes misattributed to the wrong cause entirely

Discomfort from a too-narrow shoe is sometimes mistakenly blamed on the wrong length, arch support, or even a specific model's overall quality, when a width chart check would have identified the actual issue directly — keeping width in mind as a distinct, separately checkable factor avoids chasing the wrong fix.

A custom orthotic or thick insole insert reduces usable width room inside the shoe

An orthotic device or a thicker aftermarket insole takes up interior volume that the shoe's stated width category doesn't account for, since width charts are built around the shoe's stock insole — anyone who regularly wears an orthotic or a bulkier insert is generally better served sizing up half a width category from their measured foot-width figure, to leave the same practical room the chart assumes a standard insole would leave.

A bunion or other structural change can widen one specific area more than the whole foot

A bunion, hammertoe, or similar structural foot change typically widens one localized area — often near the big toe joint — more than the foot's overall width, so a single ball-of-foot measurement can miss a problem that's really concentrated at one specific point; anyone with a known localized foot condition is often better served trying shoes on or consulting a fitter than relying purely on the general width measurement described throughout this guide.