What Size Boots…

Getting the size right matters more with football boots than almost anything else you’ll buy. Too small and you’re dealing with blisters, black toenails and lost touch on the ball; too big and your foot moves inside the boot every time you turn or sprint. This guide covers the standard size charts, how to measure your feet properly, how fit actually varies between the boots on the market today, and what to do if something isn’t sitting right.

How Football Boots Should Fit

Football boots should sit closer to your foot than a trainer does. You want your longest toe roughly a thumb’s width from the end of the boot, no more, with no dead space around the sides of your foot and a heel that stays locked when you push off or turn sharply. Trainers are built with room to spare because they’re designed to be worn all day. Boots are built to be tight enough that you can feel the ball through the upper and change direction without your foot shifting inside it first.

If you’re between a snug and a true-to-size fit, go snug. A boot that’s a touch loose will get looser as the upper gives, one that’s a touch tight rarely gets tighter. Your feet also swell during a match, so a boot that feels ideal standing in the shop can feel tight by half-time: snug should mean no dead space, not zero room to move.

Measure Your Feet

Stand up to measure, don’t sit. Your foot lengthens slightly under load, and a seated measurement will read short. Measure both feet: most people have a slightly larger foot on one side, and you should always size to the larger one. Wear the socks you’d actually play in, ideally grip socks if that’s what you use, since sock thickness genuinely changes the result.

For length, stand with your heel against a wall and measure to the tip of your longest toe (usually the big toe, but not always). For width, measure across the widest part of your foot, typically just behind the toes. Shave 3-5mm off both numbers to leave a little working room before checking them against the charts below. Do this again later in the day if you can: feet swell over the course of a day and after activity, and an evening measurement is closer to how your feet feel during a match.

Once you have both numbers, compare foot length against the chart below and cross-check your width against the width table further down. If your feet are between sizes, go up rather than down. If your two feet measure differently, buy to the larger foot and manage the smaller one with a thicker sock or an insole rather than sizing down and squeezing the bigger foot.

Football Boots Size Chart (UK to EU & US)

This football boots size chart converts UK sizes to European, US men's, US women's and centimetre sizing in one place. The sizes in the table below are for adults, both for men's football boot sizes and women's boots, just choose the correct column and adjust for your region, so you can see the difference between UK, European and USA sizing.

Kids' Boots Size Chart

Junior boots run in their own numbering up to UK 13.5K, before moving into adult sizing from UK 1 onward. With children's feet always growing, if your child is between sizes go for the larger option: boots stretch slightly with wear, but they won't shrink to fit. See Kids Sizing below for the full growing-room guidance, or chat with us if you want help working out what's best for your child's feet.

Nike, adidas & Other Brand Sizes

Nike. Nike boots run close to their own size chart, but sit differently depending on the silo. The Mercurial family (Vapor, Superfly) is narrow and low-volume, true to size in length but tight through the midfoot for wider feet. Phantom is wider and roughly a quarter-size long. Tiempo runs wide overall, including through the heel, though the toe box itself is lower and more pointed than the rest of the boot suggests. See the Fit Index below for the detail on each.

adidas. adidas and Nike sizes differ by roughly half a size in the UK-to-US conversion, which is one of the more common reasons players think a brand "runs small" or "runs large" when it's actually just a labelling difference. Predator is one of the more generous fits on the market and true to size against adidas's own chart. F50 is narrower, particularly the laceless versions. Copa Pure is generous through the forefoot but can let narrow feet slip at the heel.

Puma. Future runs on a noticeably wider last than Ultra, which is built narrow and closer to the foot. King, Puma's leather boot, has one of the widest, roomiest fits of any current premium boot.

New Balance. New Balance is one of the few brands offering genuine wide-fit options rather than just a size-up recommendation: Furon and Tekela both have a 2E width available alongside the standard fit, on top of already running on the wider side for a speed boot.

Mizuno. Japanese brand sizing tends to run slightly narrower than UK sizing generally: going half a size up from your normal UK running shoe size is a common adjustment for Mizuno, though it's worth trying a pair in person where you can. Within the range, Morelia Alpha runs true to size with a little natural room in the toe box, while Morelia Neo runs narrow and slightly long, so stay true to size on the length rather than sizing down to compensate for the width. See our wide feet boots guide for the fuller UK sizing and wide-fit brand notes.

Please don't assume that your football boot size is the same as your normal shoe size. It can be, but remember that you'll have your football socks on when you play, and a fit that's just right in trainers may end up too small in boots. A snug fit is recommended for football boots for ultimate performance, and the majority of boots are made from materials which are soft and will in time mould around your feet.

Find Boots For Your Foot Shape

Leather vs Synthetic Stretch

Leather boots mould to your foot over time. Expect a snugger, sometimes slightly uncomfortable first few sessions, loosening gradually as the leather breaks in, particularly across the toe box and midfoot. Buy a leather boot true to size or even a touch snug, not room to grow into: it'll grow into your foot, not the other way round.

Synthetic uppers (knit, synthetic leather, engineered mesh) hold their shape far more than leather. What you buy is close to what you'll have in six months. There's less break-in discomfort, but also less forgiveness if you've sized slightly wrong. For the full breakdown by material and boot, see our leather boots guide.

Grip Socks And Sizing

If you wear grip socks, measure and try boots in them, not in regular socks. Grip socks are thinner through the sole but can sit slightly differently around the ankle and midfoot, and the whole point of pairing them with a boot is a closer, more locked-in fit. A boot that feels borderline loose in a normal sock can feel right in a grip sock, and vice versa. See our grip socks guide for sizing notes by brand.

Kids Sizing

Growing feet need different judgement to a fully grown one. A few rules that hold up in practice:

Give some room to grow, but not a size and a half of it. Half a size of growing room is normally enough to get a good season out of a pair of boots without the boot being so loose it affects control or increases the risk of rolling an ankle in a turn.

Signs the boot is too small: toe pressure, red marks on the foot after playing, or your child saying their foot "hurts by the second half" rather than straight away. Signs it's too large: heel slipping, the boot visibly twisting on the foot during a turn, or blisters appearing where there wouldn't normally be friction.

Re-measure more often than feels necessary. Kids' feet don't grow at a steady rate, and a boot that fit perfectly four months ago may not fit now.

Sizing up excessively to save money doesn't help performance or comfort: a boot that's too loose costs a child touch and control, and increases the risk of blisters and rolled ankles rather than preventing them.

For the full junior-to-adult size chart, see the Kids' Boots Size Chart above, or the complete kids' boots guide.

Common Fit Problems

If your boots don't feel right, the cause is usually one of a small number of things, and it's rarely "the wrong size" in the way people assume.

Frequently Asked Sizing Questions

Related Guides

• Wide Feet Boots
• Narrow Feet Boots
• Kids' Boots
• Women's Boots
• Grip Socks
• Leather Boots

Football Boots Guide