How-to
How to measure your feet correctly
Measure both feet in consistent conditions, then use the manufacturer’s measured-foot guidance to find a starting size.
Equipment and timing
Use paper larger than your feet, a hard floor, a pencil and an accurate ruler. Nike recommends measuring late in the day with the socks you intend to wear. Foot swelling varies; a fixed percentage is not a reliable personal allowance.
Measure heel to longest toe
Stand on the paper as the brand instructs, mark the back of the heel and longest toe, and measure their separation. Repeat for the other foot. Record both and use the larger relevant measurement. Keep the pencil upright and avoid measuring at an angle.
Width and circumference are different
Width is the straight-line distance across the widest part of the foot. Girth is a tape measurement around the ball. Record the dimension the chart requests; do not substitute one for the other.
Use the right column
Match measured length to the manufacturer’s foot-length chart. Nike notes that CM on the box differs from foot length. Do not add a universal amount of toe room to a chart that already accounts for fitting space. Check the shoes on both feet.
Frequently asked questions
- Does this guidance guarantee fit?
- No. Use current product-specific measurements and an actual fit check; generic conversions are approximate.
Approximate guidance · Confirm the current product chart