Home › Guides › Kids

Kids' Shoes Buying Guide: Sizing, Growth, and When to Replace Them

By Alex Carter · Published 2026-09-20 · Updated 2026-09-20 · 10 min read

Children's feet grow fast, change shape, and cannot always tell you when a shoe hurts. This guide explains how to measure growing feet, how much room to leave, which features actually matter at each age, and when a pair is outgrown — so you buy the right size the first time and replace shoes before they start causing problems.

Children's Feet Grow Faster Than You Think

A toddler's foot can grow a full size every two to three months. A child between two and five typically grows about a size every three to four months. Between six and ten, the pace slows to roughly a size every four to six months, and in the early teenage years growth comes in spurts that can add a size in a matter of weeks. That pace is why the shoes that fitted perfectly in September can be too small by Christmas, and why buying children's shoes is a cycle of measuring, checking, and replacing rather than a one-off purchase. It is also why the most important habit is not buying a particular brand, but checking the fit regularly — once a month for toddlers, every two months for younger children, and every two to three months for older children.

Growing feet are also more vulnerable than adult feet. The bones in a child's foot are still forming, the arch is still developing, and the foot is more flexible and more easily shaped by pressure. A shoe that is too small does not just cause blisters; it can squeeze the toes together, press on the growth areas, and change how the child walks. A shoe that is too big is not much better: the foot slides around inside it, the child trips more often, and the heel slips with every step. Children also adapt to discomfort without complaining — they may simply walk less, run less, or avoid an activity rather than tell you the shoes hurt — so a regular fit check matters more than waiting for a complaint.

How to Measure a Child's Feet Properly

Measure both feet standing up, with weight on them, wearing the socks the child will wear with the shoes. Have the child stand on a piece of paper and trace around each foot, or use a proper measuring gauge at a shoe shop, which is more accurate and free. Measure length from the back of the heel to the tip of the longest toe, and width across the widest part of the forefoot. Do it in the afternoon if you can, when feet are at their largest, and always fit the larger foot — most children, like most adults, have one foot slightly bigger than the other.

The right amount of growing room is about a thumb's width — roughly 1 to 1.5 centimetres — between the longest toe and the end of the shoe. Less than that and the shoe will be outgrown almost immediately. More than that and the shoe is too big: the foot slides forward, the heel slips, and the child is more likely to trip. When you check a shoe the child already owns, press the toe of the shoe gently to feel where the longest toe sits, and ask the child to wiggle their toes: if they cannot, the shoe is too small. Also check the width by looking at the shoe from above — if the foot bulges over the sides of the sole, the shoe is too narrow, and a longer size will not fix it. Our wide and narrow feet sizing guide explains width in detail, and the same principles apply to children's feet.

What Matters at Each Age

For babies who are not yet walking, shoes are mostly for warmth and protection, not support. Soft-soled shoes or booties are the right choice: they keep the foot warm, protect it from rough ground, and let the foot move freely. Hard soles on a baby who is not walking restrict the foot for no benefit. Once a child starts walking, the shoe should still be flexible: pick it up and bend it at the ball of the foot — it should bend easily there and stay firm elsewhere. A stiff shoe fights the natural walking motion and can make a new walker unsteady.

For toddlers and preschoolers, the priorities are flexibility, a secure fit, and a sole that grips. Look for a lightweight shoe with a flexible sole, a roomy toe box that lets the toes spread, and a fastening the child can manage or that stays secure — hook-and-loop straps are often the best choice at this age, because they are easy to adjust and easy for the child to use. Avoid high heels, raised soles, and heavy boots for everyday wear: they change how the child walks and add weight the child does not need. For school-age children, durability starts to matter as much as fit, because children run, climb, kick, and scuff their shoes daily. Look for reinforced toe caps, strong stitching, and an outsole that can handle playground surfaces. For teenagers, adult sizing takes over, but the foot is still growing and still needs regular checks, and sports shoes need to match the sport — a running shoe for running, a court shoe for court sports — rather than one pair for everything.

Choosing Shoes for School, Sport, and Play

Most children need three types of shoe: an everyday shoe for school and daily wear, a sports shoe, and a weather shoe for rain or winter. The everyday shoe should be comfortable, durable, and easy to get on and off. The sports shoe should match the activity: running shoes for running and general PE, with cushioning and grip, and sport-specific shoes for sports played regularly. A child who plays football twice a week needs football boots; a child who does PE twice a week does not. The weather shoe depends on your climate: waterproof shoes or boots for wet winters, as explained in our rain shoes guide and winter footwear guide.

For school shoes, check the school's rules first — many schools specify colour and style — and then choose within those rules for fit and comfort rather than looks alone. A school shoe is worn for six or more hours a day, five days a week, so it is the pair where fit matters most. Leather school shoes are durable and polish well, but they need breaking in; synthetic school shoes are lighter and need no breaking in, but they breathe less and can be hot. Whichever you choose, make sure the shoe has a removable insole: it makes cleaning easier and lets you check the wear pattern, which tells you how the child's foot is landing.

Age	Typical growth pace	Check fit every	Key features
Under 2 (pre-walking)	Very fast	Monthly	Soft soles, warmth, protection
2–5 years	A size every 3–4 months	Every 6–8 weeks	Flexible sole, roomy toe box, easy fastening
6–10 years	A size every 4–6 months	Every 2–3 months	Durability, reinforced toe, grip
11+ years	Growth spurts	Every 2–3 months	Adult sizing, sport-specific shoes

Signs a Shoe Is Outgrown

The most reliable sign is the toe test: if the longest toe is less than about half a centimetre from the end of the shoe, the shoe is outgrown, even if the child says it still fits. Other signs include the child taking shoes off at every opportunity, complaining of sore toes or heels, developing blisters or red marks, walking differently — shuffling, or walking on the outsides of the feet — and the shoe showing a bulge where the foot presses against the side. Check the outsole too: worn through at the heel or the ball of the foot, or a sole that has come away from the upper, means the shoe is finished even if it still fits.

Hand-me-downs deserve a caution. A shoe moulds to the foot that wore it, and the wear pattern on the sole reflects that child's gait. Passing shoes to a younger sibling can pass on a wear pattern that does not match the second child's foot, which can affect how they walk. If the shoes are barely worn, hand-me-downs are fine. If the soles are visibly worn on one side, or the upper has stretched to the shape of the first child's foot, they are better retired. The same applies to second-hand shoes bought online: check the sole wear carefully before you buy.

Buying Without Tears: Practical Tips

Shop in the afternoon, when feet are largest, and bring the socks the child will wear. Let the child walk, run, and jump in the shoes in the shop — a shoe that looks right but feels wrong when the child runs is the wrong shoe. Avoid buying a size up to grow into beyond the thumb's width of room: it is tempting when shoes are expensive, but a shoe that is too big causes trips, blisters, and bad walking habits, and the saving is not worth it. If budget is tight, buy fewer pairs of better shoes rather than many pairs of cheap ones, and remember that a good everyday shoe and a good sports shoe cover most of a child's week.

For online buying, measure the child's feet in centimetres and use the brand's own size chart — the centimetre measurement is more reliable than the US or EU size, because sizing varies between brands. Check the return policy before you order, and order one pair first rather than two. When the shoes arrive, have the child wear them indoors for a day before you commit: if they hurt, send them back. Our shoe size conversion guide explains how sizes translate between US, UK, and EU systems, which is useful when you are buying from an international brand.

Mistakes to Avoid

The most common mistake is buying too big to grow into — a shoe that is a full size too large is a tripping hazard and a blister risk, not a bargain. The second is buying by age rather than by measurement: children of the same age can be two sizes apart, and age-based sizing is a guess. The third is ignoring width: a child with a wide foot needs a wide fitting, not a longer shoe. The fourth is handing down heavily worn shoes. And the fifth is buying fashion shoes — heavy boots, high heels, stiff fashion trainers — as everyday shoes for a child who will run and play in them all day. A child's everyday shoe should be light, flexible, and comfortable first, and everything else second. For the breaking-in side of any new pair, see our break-in guide, and for keeping school shoes comfortable through a long day, our guide to shoes that don't hurt after 10,000 steps applies to older children too.

Children's shoes are a moving target, and the goal is not to buy the perfect pair once, but to build the habit of measuring, checking, and replacing at the right time. Get the fit right, keep the sole flexible, match the shoe to the activity, and your child's feet will do the rest.

← Back to all guides