Kids can grow out of shoes surprisingly quickly. One week a pair seems completely fine, and the next it is harder to get on, your child suddenly wants it off, or their toes look a little cramped.

The tricky part is that younger kids do not always say, "My shoes are too small."

Sometimes the clues are less obvious. If you are not sure what a good fit should look like, start with our guide to how kids' shoes should fit. Then use the signs below to check the pair they are wearing now.

Here are seven things worth checking if you are wondering whether it might be time for the next size.

7 signs kids’ shoes may be too small

1. There is hardly any room in front of their toes

Start with the most obvious one: length.

Healthdirect Australia's guidance on children's feet recommends choosing shoes with the right length, width and depth, with about 1 cm of room between the longest toe and the end of the shoe. It also advises allowing the toes to move freely and making sure the heel is neither too loose nor too tight.

If your child's longest toe is already reaching the front of the shoe, it is probably time to remeasure. And remember, the big toe is not always the longest one.

2. You are seeing repeated red marks or pressure spots

Have a quick look at your child's feet when the shoes come off.

A light sock mark that disappears quickly is not necessarily a problem, but repeated redness, rubbing or pressure around the toes or sides of the foot can be a sign that the shoe is getting too snug.

Pay attention to where the marks appear. If there is still room at the front but redness along the sides, the issue may be width rather than length.

That is why checking only the shoe size number does not always tell you the whole story.

3. Their toes look crowded inside the shoe

A shoe can technically be long enough and still be too narrow.

Look at the shape of your child's toes and forefoot while they are standing. Do their toes have room to sit naturally, or are they being pushed together by the shape of the shoe?

Good fit is not only about length. Australian children's footwear guidance also recommends choosing a shoe that follows the natural shape of the foot, particularly around the toes.

This is one reason Rafferty's shoes use a wide, foot-shaped toe box rather than tapering sharply inward at the front. If you want to know what to look for, read our guide to wide toe box shoes for kids.

If your child's current shoes are consistently tight through the toes, you can also explore our kids' barefoot shoes, which are designed with a wide, foot-shaped toe box and flexible sole.

4. Getting the shoes on has suddenly become difficult

If a pair that used to go on easily now involves a wrestling match every morning, it is worth checking the fit.

You might notice:

• their foot is harder to slide into the shoe
• the Velcro barely reaches where it used to
• you need to pull the fastening much tighter
• the shoe feels tight across the top of the foot
• their toes are pushing forward while you put the shoe on

Sometimes this happens because the foot has grown in length. Other times, your child may have grown through the width or instep first.

Measure again rather than automatically assuming the next numbered size will solve the problem.

5. They keep asking to take that particular pair off

Some kids will happily announce that their shoes hurt. Others will simply remove them at every opportunity.

If your child consistently wants the same pair off soon after putting them on, check the fit before assuming they just do not like shoes.

Look for:

• tightness across the toes
• pressure along the sides
• rubbing at the heel
• tightness across the top of the foot
• toes reaching the end

Of course, kids take their shoes off for plenty of reasons. But if it suddenly starts happening with a pair they previously wore without a problem, growth is worth ruling out.

6. They complain about sore toes, rubbing or discomfort

Older children might be able to tell you exactly what feels wrong. With younger kids, you might hear something more general, like "These hurt" or "I do not like these shoes."

Recurring discomfort should not simply be ignored. Poorly fitting shoes can contribute to short-term problems such as rubbing, blisters or sore toes.

There is also research behind the comfort side of fit. A peer-reviewed University of South Australia study compared fitted, smaller and larger school shoes in children aged 8 to 12. The smaller shoes were rated tighter at the heel and toes, and they restricted some foot motion during walking compared with correctly fitted shoes.

7. A pair they used to move comfortably in suddenly seems awkward

If your child suddenly looks uncomfortable or less confident in a particular pair, check the fit.

But keep this one in perspective. Not every trip, unusual step or change in walking is caused by shoes.

If changes in walking are ongoing rather than limited to one pair of shoes, it is worth looking beyond the footwear itself. Healthdirect Australia advises seeking medical advice for concerns such as frequent tripping or falling, an uneven gait, ongoing pain, or a child who begins limping or refusing to walk.

So think of a sudden change only in one pair of shoes as a reason to check the fit, rather than assuming footwear is responsible for an ongoing walking issue.

How can you check whether the shoes still fit?

Rather than waiting until your child complains, remeasure their feet regularly. A good fit involves more than just length.

• Length: around 1 cm of growing room in front of the longest toe
• Width: no obvious squeezing across the widest part of the foot
• Toe room: toes should be able to sit and move naturally
• Heel: secure without excessive slipping
• Instep: comfortable across the top of the foot
• Fastening: secure without needing to be pulled extremely tight

It is worth measuring both feet rather than assuming they are exactly the same size. If you are checking Rafferty's sizing, use our Kids' Shoe Size Guide to compare your child's measurements with the current size chart.

How much growing room should you leave?

Around 10 mm, or 1 cm, is a useful starting point for children's shoes. But more space is not automatically better.

There is not one universally standardised children's footwear rule. A 2025 rapid scoping review of children's footwear guidance found that recommendations vary and that much of the guidance still relies on expert consensus rather than high-quality experimental evidence. For practical everyday fitting, Healthdirect Australia uses about 1 cm of growing room as a guide.

The goal is enough room for growth while still keeping the shoe comfortable and secure around the rest of the foot.

What if the length looks fine but the shoe still feels tight?

This is where width comes in.

Some kids have plenty of room in front of their toes but still feel squeezed through the forefoot or across the top of the foot.

If you find yourself continually sizing up just to get enough width, look at the shape of the shoe, not only the size number. Going longer does not always solve a width problem.

A wider, foot-shaped toe box can give the toes more room without adding unnecessary extra length in front.

For more on this, see Wide Toe Box Shoes for Kids.

How often should you check?

Kids' feet can change quickly, particularly when they are younger.

You do not need to buy new shoes according to a calendar, but it is worth rechecking the fit regularly and after an obvious growth spurt.

A simple habit is to measure, check the fit, then compare with the individual brand's size guide. Do not rely only on the size they wore last time because sizing and internal shoe shape can vary between brands.

The bottom line

Kids do not always announce when they have outgrown their shoes. Sometimes the first clues are smaller things: less toe room, repeated red marks, difficulty putting the shoes on, or suddenly wanting them off.

If something seems different, remeasure both feet and check length, width, toe room, heel fit and instep rather than looking at the size number alone.

If your child has recurring pain, frequent tripping or an ongoing change in how they walk, it is worth seeking professional advice rather than assuming the shoes are the cause. See Healthdirect's guidance on when to seek help.

Need help finding their next size?

Start with our Kids' Shoe Size Guide, or get in touch and we will happily help you work out the best Rafferty's fit.

If their current pair really has been outgrown, shop Rafferty's kids' barefoot shoes to see the current colours and sizes.