Fit & Sizing Guide

Measure First, Guess Never

Stand on a sheet of paper with your heel against a wall, mark the tip of the longest toe — which is not always the big one — and measure the distance in centimeters. Do it in the evening, when feet are at their largest, and do it for both feet: a difference of half a size between left and right is completely ordinary, and the larger foot is the one that picks the size.

Then Add Room

A barefoot shoe should give your longest toe roughly a thumb’s width — about 1 cm — of space at the front while standing. That gap is not slack; it is where the foot lengthens as it takes your weight and pushes off. Fit a barefoot shoe like a dress shoe and you cancel the whole point of the toe box.

Foot length	US men	US women	Notes
22.5 cm	—	5.5–6	Size up if the foot is broad across the ball
23.5 cm	5.5–6	7	Half sizes: take the larger one
24.5 cm	6.5–7	8	Most-ordered range for women
25.5 cm	7.5–8	9	—
26.5 cm	8.5–9	10	Most-ordered range for men
27.5 cm	9.5–10	11	—
28.5 cm	11	—	Thick socks: size up
29.5 cm	12	—	—

The chart is a starting point for the range as a whole. The exact size run, the width options and the conversion for a specific pair are listed by the retail partner on that product’s page — check them before you order.

Wide Feet and High Insteps

The forefoot is generous on every last we build, so genuinely wide feet usually stay at their normal length. The tighter spot is the instep: if the top of your foot is high, favor lace-up styles over slip-ons and Mary Janes, since laces let you open the throat of the shoe and slip-ons do not.

Socks Change the Answer

Thin liner socks and bare feet fit the same. Cushioned winter socks and toe socks add real millimeters, and a shoe that is perfect in August can be tight in January — if you plan to wear thick socks daily, take the larger half size.

Kids Grow Between Orders

Measure children every couple of months and allow a full centimeter of growth room. A barefoot shoe that is slightly long does no harm because the sole is flat and flexible; one that is short undoes exactly what it was bought to protect.

The First Two Weeks

• Wear the new pair an hour a day at first, on flat ground, doing ordinary things.
• Expect the calves to complain before the feet do — that is the zero drop introducing itself.
• Keep the insole in for the first couple of weeks if the ground feel is startling, then pull it out.
• Postpone runs until a full day of walking feels unremarkable.

Still Between Sizes?

Write to [email protected] with your measurement in centimeters and the style you are looking at, and we will tell you which way we would lean.