How to Measure Your Foot Size at Home: A Step by Step Guide

Why measure at home

Your foot size changes over time. Age, weight, pregnancy, and even the time of day can alter the length and width of your feet. A pair of shoes that fit last year may not fit this year. Relying on a size you remember from an old pair of shoes is a common reason for buying shoes that are too small or too loose.

Measuring at home gives you a reliable baseline. The method below uses simple tools you already have: a piece of paper, a ruler or tape measure, a pencil, and a wall. It takes about five minutes per foot and removes the guesswork from online shoe shopping.

Foot health organizations emphasize the importance of properly fitting shoes. The American Podiatric Medical Association (APMA) notes that your feet are your foundation for a healthy and happy life, and the American Academy of Orthopaedic Surgeons (AAOS) provides patient education to help you make informed decisions about your health. A correct fit starts with a correct measurement.

What you need

Wear thin socks when you measure. If you plan to buy boots or shoes for colder weather with thicker socks, measure wearing those thicker socks. The thickness of your sock changes the fit, so matching the sock to the intended use gives you a more accurate size.

Measure both feet. Most people have one foot slightly larger than the other. Always size to the larger foot to avoid buying shoes that are too tight on one side.

• A piece of paper larger than your foot (printer paper works for most adults; tape two sheets together if needed)
• A ruler or a tape measure with clear markings
• A pencil or pen
• Masking tape or painter's tape
• A wall you can stand against
• A pair of thin socks (the kind you plan to wear with the shoes you are buying)

Step by step: how to measure foot length

Place the paper on the floor with the long edge against the wall. Tape it down so it does not slide while you stand on it.

Sit on a chair next to the paper, or have someone help you. Place your heel against the wall where it meets the paper. Your heel should touch the wall, and your foot should be flat on the paper.

Stand up straight with your weight evenly on both feet. Your weight flattens and lengthens your foot slightly, which is the correct posture for measuring. Do not curl your toes or lean forward.

Have someone mark the longest point of your foot. This is usually the tip of your longest toe, which may be your big toe or your second toe. If you are alone, you can bend down carefully to make the mark, but keep your heel against the wall.

Step off the paper. Use the ruler or tape measure to measure the distance from the edge of the paper that was against the wall to the mark you made. That distance is your foot length.

Repeat the process for the other foot. Record both lengths, and use the longer one as your reference.

How to measure foot width

Foot width matters as much as length, especially for people with wide or narrow feet. A shoe that is the right length but the wrong width will feel tight across the ball of the foot or slip at the heel.

To measure width, stand on a fresh piece of paper as described above. Instead of marking the longest point, mark the widest part of your foot. This is usually across the ball of the foot, just behind the toes.

Measure the distance between the two marks with the ruler. This is your foot width.

Compare the width to the length. If the width is more than about 0.4 inches (1 cm) greater than the average for your length, you may need a wide width. The shoe width explained article has more detail on how width sizing works.

When to measure: tips for accuracy

Measure your feet in the evening. Feet naturally swell during the day from standing and walking. A measurement taken in the morning may be smaller than your foot size later in the day, and shoes sized from a morning measurement can feel tight by the afternoon.

Measure both feet every time you buy a new pair of shoes. Do not assume your size is the same as it was six months ago. This is especially important if you are buying boots or shoes with a firm toe box, such as safety toe shoes or steel toe shoes, where a too-short fit can cause pressure on the toes.

If the two feet measure differently, use the larger foot for your size. You can always add an insole or a heel pad to the shoe for the smaller foot if needed, but you cannot stretch a shoe that is too short.

From measurement to shoe size

Once you have your foot length and width in inches or centimeters, you need to convert that to a shoe size. The conversion depends on the sizing system: US, UK, or EU. The article shoe size conversion US EU UK explains how to translate your measurements into the sizing system used by the brand you are buying.

Keep in mind that different brands and different shoe types fit differently. A running shoe often fits differently from a dress shoe or a boot. The same size can feel different between brands. The measurement gives you a starting point, not an absolute guarantee.

When you try on shoes or look at the size table from a brand, add a small amount of room in the toe. For most shoes, you want about a thumb's width of space between your longest toe and the end of the shoe. The article how much toe room do you need explains this in more detail.

Special considerations

If you have a foot condition such as bunions, hammertoes, or flat feet, measure the foot exactly as it is, including the widest part of the bunion or the full length of the toes. Do not try to squeeze the foot into a smaller size. The shape of the shoe, not just the size, matters for comfort. The toe box shapes article describes how different toe shapes accommodate different foot shapes.

For people with wide or extra wide feet, the width measurement is just as important as the length. Many brands offer wide sizes, and some models run wider than others. The wide or extra wide shoes guide lists options that fit wider feet.

If you are buying shoes for a child, measure their feet every few months. Children's feet grow quickly, and a shoe that fit a month ago may now be too short. The same measuring method works for children, but have the child stand with their weight on the foot being measured.

What to pick for your use

Questions

Can I measure my foot size by tracing it on paper?

Yes, tracing works as an alternative. Place your foot on a piece of paper, trace the outline with a pencil held vertically, then measure the length from the heel to the longest toe and the width at the widest point. The wall method described here is slightly more accurate because the wall gives you a straight reference line for the heel, but tracing is a good backup.

How much toe room should I leave when measuring?

After you have your foot length measurement, add about a thumb's width (roughly half an inch or 1.3 cm) of space when choosing the shoe length. This gives your toes room to move without hitting the front of the shoe, especially when walking downhill or when your foot slides forward slightly.

Do I need to measure both feet?

Yes. It is common for one foot to be slightly larger than the other. Measure both feet and use the larger measurement to determine your shoe size. Buying shoes to fit the smaller foot can cause discomfort on the larger foot.

Is it better to measure feet in the morning or at night?

Measure in the evening. Feet swell during the day, so an evening measurement reflects your foot size at its largest. Shoes sized from an evening measurement are more likely to stay comfortable throughout the day.

What if my foot measurement falls between two sizes?

If your measurement is between two sizes, size up to the larger size. It is easier to add an insole or a heel grip to a slightly larger shoe than to stretch a shoe that is too small. A shoe that is slightly too large can also be adjusted with lacing techniques, but a shoe that is too short cannot be fixed.

Does the measuring method work for children?

Yes, the same method works for children. Have the child stand on the paper with their heel against the wall, make sure they are standing straight, and mark the longest point. Since children's feet grow quickly, measure their feet every few months before buying new shoes.