Do Hiking Boots Run Small or Large?
There is no universal answer. Sizing varies between brands (for example, see our La Sportiva and Oboz reviews for brands that tend to run small or snug), between models from the same brand, and between men’s, women’s and unisex lasts. Many hikers end up wearing hiking boots about a half size larger than their everyday shoes, partly because feet swell on long walks and partly because hiking socks are thicker. That is a common pattern, not a rule, so treat your usual size as a starting point and confirm with a proper try-on. The full routine is in our guide on how to fit hiking boots.
Measure Your Feet at Home
Measuring takes only a few minutes and gives you a number to compare against brand size charts.
- Measure late in the day, when your feet are at their largest.
- Wear the socks you hike in.
- Stand on a sheet of paper against a wall, with your heel touching the wall and your weight evenly on both feet. Sitting can give a smaller reading.
- Mark the tip of your longest toe, which is not always the big toe.
- Measure from the wall to the mark. Also measure the widest part of the foot, across the ball.
- Repeat for both feet and use the larger measurement.
Compare your numbers with the manufacturer’s chart for the specific boot. Charts differ, so do not reuse a number from a different brand.
Length: How Much Room Do You Need?
When standing, you generally want around a thumb’s width of space between your longest toe and the front of the boot. This gives your toes room on downhills, where the foot slides forward. Too much space, though, lets your foot slide and can cause blisters, so more is not better.
A simple check: with the laces undone, push your foot forward until your toes touch the front, then see how much room is behind your heel. A finger-width or so is typical.
Width and Volume
Length gets most of the attention, but width and volume matter just as much.
- If the ball of your foot feels squeezed or your little toe is pressed, try a wide version if the model offers one.
- If your foot swims and you have to crank the laces, a narrower model may fit better.
- Volume, meaning how tall the boot is over the instep, varies between brands. If one brand always feels too roomy or too tight, trying another last often helps more than changing size.
Men’s, Women’s and Unisex Sizing
Women’s boots (see our women’s hiking boots review) are usually built on a narrower last with a lower-volume heel than men’s boots, but this is not guaranteed. Some people with narrow feet prefer women’s models, and some people with wide feet prefer men’s models. Convert sizes using each brand’s own chart; the conversion between men’s and women’s sizes is not identical across brands.
Sock Thickness and Swelling
Sizing is not just a number. A medium-cushion wool sock takes up more room than a thin liner (see should hiking socks be thick or thin). Always check fit with the socks you will actually wear. Feet also swell on long days and with heat, so a boot that feels borderline in a cool shop may feel tight on a hot afternoon.
Do Hiking Shoes Need to Be Bigger?
Often a little roomier is better than a snug street-shoe fit, mainly for downhill toe room and swelling. Still, the heel should stay locked down. If a size up makes the heel slip, try a different model rather than adding extra socks.
Buying Hiking Boots Online
- Check the return policy and keep the packaging until you are sure.
- Try boots on indoors, on a carpet, at the end of the day.
- Walk up and down stairs if you can.
- Read reviews specifically about sizing and width for that model, using how to read hiking boot reviews.
When to Re-check Your Size
Foot size can change over time, with age, pregnancy, weight change or injuries. If you have not been fitted in several years, measure again before replacing worn boots. Remember that a correct size is only part of a good fit, so also review the heel and toe checks in our fitting guide, and make sure you have laces that suit the boots; see shoelace length for hiking boots.