How Quickly Do Children Outgrow Orthotic Shoes?

Children's feet grow at different rates depending on age. The following table gives a general guide:

Age	Approximate Growth Rate
Under 3 years	Up to 3 sizes per year
Ages 3 to 10	Approximately 2 sizes per year
Ages 10 to 14	Approximately 1 size per year
After 14	Slowing, approaching adult size

This means that shoes sized correctly today may be too small within 3 to 4 months for a young child, or 6 to 12 months for an older child. Growth often happens in sudden spurts rather than gradually, so a shoe that fitted well last week can feel tight seemingly overnight.

Do not wait for visible wear on the outside of the shoe. By the time the sole is worn through or the upper is splitting, the shoe has been failing your child's orthotic for weeks or months. Instead, check monthly and look for these signs:

• The heel counter has collapsed. Squeeze the back of the shoe. If it no longer resists compression and holds its shape, the shoe is not supporting the orthotic properly.
• The sole is visibly worn on one side. Uneven wear indicates that the shoe is no longer providing a level platform for the orthotic.
• The toes are reaching the end of the shoe. There should always be roughly a thumb's width of space between the longest toe and the front of the shoe with the orthotic in place.
• Your child says the shoes hurt. Children do not always complain about gradual discomfort, so ask directly. Pain, rubbing, or tightness across the top of the foot are all signs that the shoes no longer fit.
• The orthotic no longer sits flat. If the orthotic is tilting, riding up at the edges, or moving around inside the shoe, the shoe has lost its internal structure.

The orthotic device wears out separately from the shoes. Even if the shoes are fine, the orthotic itself may need replacing. Look for:

• The original symptoms return. This is the most important signal. If the pain, gait issues, or instability that the orthotic was prescribed to address start coming back, the device may no longer be providing adequate correction.
• Visible compression, cracks, or splits. Check the device regularly for signs of material breakdown, particularly under the heel and arch where pressure is greatest.
• The device no longer fits the foot. If the orthotic looks too short, too narrow, or sits at the wrong angle relative to the foot, the child has outgrown it.
• Your child has grown significantly. A device fitted at one size is not effective at two sizes bigger. The arch position, heel cup size, and correction angle are all specific to the foot size at the time of fitting.

For NHS orthotics, you do not need a new GP referral to get a replacement. Contact the orthotics department directly. Your child's original referral places them in the system, and the department can arrange a review and new device.

A monthly fit check takes under two minutes and can save you from problems building up unnoticed. Here is how to do it:

1. Have your child stand with the orthotic in place inside the shoe, wearing their normal socks, with full weight on both feet.
2. Press your thumb above the big toe. There should be roughly a thumb's width of space between the longest toe and the end of the shoe.
3. Check that the heel does not slip. Ask your child to walk a few steps. The heel should stay firmly in the shoe without lifting.
4. Ask your child about tightness or rubbing. Specifically ask about pressure across the top of the foot, rubbing at the heel, and any new areas of soreness.

If the shoe fails any of these checks, it is time to shop for a replacement pair.

While you cannot stop your child's feet from growing, you can take steps to ensure each pair of shoes lasts as long as it should:

• Do not buy shoes that are too big. It is tempting to buy a size up for extra growing room, but shoes that are too large are a tripping hazard and prevent the orthotic from sitting in the correct position. Aim for a thumb's width of growing room, no more.
• Rotate two pairs if possible. Alternating between two pairs of compatible shoes allows each pair to dry out fully between wears, which slows the breakdown of materials inside the shoe.
• Check lacing and fastenings regularly. Loose laces or worn Velcro mean the shoe is not holding the foot securely over the orthotic, which accelerates wear on both the shoe and the device.

Can I buy shoes that are too big so they last longer?

A small amount of growing room is fine and expected. More than a thumb's width, however, creates problems. Shoes that are too large are a tripping hazard, particularly for younger children. The orthotic will not sit in the correct position relative to the foot, which means the correction it provides will be inaccurate. This defeats the purpose of the device.

My child needs their orthotics replaced every 6 months. Is that normal?

Entirely normal during peak growth years. Children between the ages of 3 and 10 grow approximately two shoe sizes per year, and the orthotic device is fitted to a specific foot size and shape. Significant growth means the device needs refitting. Contact the orthotics department proactively when you notice signs of outgrowing.

Are there adjustable orthotic devices that grow with my child?

Some orthotic devices are designed with adjustable features that can be modified as the child grows, extending the usable life of the device. Not all conditions are suitable for adjustable devices. Ask your child's orthotist whether this is an option.

My child's feet seem to be growing at different rates. Is that a concern?

It is common for children's feet to be slightly different sizes. Measure both feet monthly and size for the larger foot (or the foot with the orthotic). If the difference is growing significantly, mention it at the next orthotics appointment. Read our sizing guide for advice on managing different-sized feet.

Browse our full Children's Orthotic Shoe Buyer Guide