Why should kids try on shoes while wearing the socks they will actually use?

Sock thickness, toe seam placement, and fabric bulk all affect how much space remains at the toe and across the forefoot inside a shoe. The American Podiatric Medical Association advises parents to have children try on shoes with socks or tights if that is how they will be worn, because a shoe that fits over a thin ankle sock may compress the toes when paired with a thick athletic sock.

At what age does a child's foot arch fully develop?

The longitudinal arch typically begins forming before a child starts kindergarten and is often not fully realized until around age 6, according to foot development literature reviewed by chiropodists. Because foot bones continue hardening through adolescence, the years between ages 3 and 12 are a sustained window during which ill-fitting footwear and constricting socks can affect natural arch formation and toe alignment.

What signs show that a child's shoes or socks no longer fit properly?

The APMA recommends watching for redness on the toes or heel after wear, signs of irritation, and uneven heel wear, which can indicate that shoes are too tight, too loose, or mismatched with the sock layer. Children who avoid activity, limp, or complain of foot pain should be evaluated by a podiatrist.

APMA: Fit Kids' Shoes With Socks to Protect Arch Development

Child's feet in white crew socks resting beside a pair of sneakers — Photo: Unsplash

Key facts

During April 2026 - National Foot Health Awareness Month - the American Podiatric Medical Association (APMA) is reminding parents to always fit children's shoes while the child is wearing the socks they will actually use for school, sports, or everyday play. A scoping review published in Healthcare (Basel) in July 2025 by researchers at Southeast Technological University and Leeds Beckett University found that existing children's footwear guidelines lack standardization, with no clinical consensus on how to define proper fit, toe allowance, or optimal cushioning across governmental and professional sources. For children ages 3 through 12 - whose foot bones continue hardening through adolescence - what goes inside the shoe is part of the complete fit system.

The APMA advises parents to always buy to the larger foot, since children's feet are rarely identical in size, and to fit shoes while the child wears the socks they will use day-to-day.
The 2025 scoping review identified toe allowance, the space between the longest toe and the interior end of the shoe, as a parameter with no standardized clinical definition across global guidelines.
A child's longitudinal arch typically begins forming before kindergarten and is often not fully realized until around age 6, a window during which constricting sock seams and fabric compression can work against natural development.

What it means for parents

Most parents check shoe size when fitting a new pair - but the sock layer inside the shoe is equally part of what determines whether a child's toes can spread naturally, whether the heel sits correctly, and whether the foot's arch is free to load and unload with each step. A sock with a bulky toe seam, tight ribbing near the arch, or poor length fit can bunch inside the toe box and push the toes toward a position the shoe was never designed to create. This is especially relevant for sensory-sensitive children, who may not communicate discomfort clearly and instead pull off shoes, avoid walking, or show behavior changes tied to foot irritation.

The APMA recommendation to try on shoes with the actual socks to be worn is practical and low-cost. It costs nothing to bring along the sock the child uses for soccer practice when shopping for cleats, or to put on a school-day crew sock before testing a new pair of sneakers. Shoes that feel right over a thin liner but pinch over a standard cotton crew are not properly fit for the child's actual use case.

Background and context

The 2025 scoping review in Healthcare (Basel) evaluated footwear guidelines published between 1970 and 2024, drawing on PubMed, Google Scholar, ScienceDirect, and governmental databases. The authors found that recommendations from bodies including the APMA, the NHS, and the World Health Organization frequently rely on expert opinion rather than high-quality empirical data, and that no uniform standard exists for how to measure whether a shoe fits a growing child. The review's finding on toe allowance is particularly relevant to the sock question: if clinical bodies cannot agree on how much space should exist between the toe and the shoe's interior wall, parents have no standardized guidance - and the sock layer is the variable most often overlooked.

Foot development research adds urgency to the topic. The 26 bones in a child's foot contain more cartilage than bone in the early years, and the arch does not fully harden or take shape until well into elementary school. During this window, repeated compression from ill-fitting socks - bunched fabric near the toes, tight seams across the arch, or excess length folded under the foot - can influence how the forefoot loads during gait. Socks made from breathable, moisture-managing materials also reduce the risk of fungal infections, a concern the APMA specifically associates with hand-me-down footwear and shared athletic shoes.

Takeaway

When shopping for children's shoes this spring, bring the socks your child will actually wear and test the full combination. Watch for redness, irritation, or uneven wear patterns on the heel after the first few days of use - these are the signs the APMA flags as indicators that the shoe is not properly fit. For parents looking to reduce seam friction and fabric bunching at the toe, SUNBVE's seamless-toe combed-cotton crew socks are built specifically to remove the internal toe seam that most often causes pressure inside a snug shoe.

Sources

Frequently asked questions

Why should kids try on shoes while wearing the socks they will actually use?: Sock thickness, toe seam placement, and fabric bulk all affect how much space remains at the toe and across the forefoot inside a shoe. The American Podiatric Medical Association advises parents to have children try on shoes with socks or tights if that is how they will be worn, because a shoe that fits over a thin ankle sock may compress the toes when paired with a thick athletic sock.
At what age does a child's foot arch fully develop?: The longitudinal arch typically begins forming before a child starts kindergarten and is often not fully realized until around age 6, according to foot development literature reviewed by chiropodists. Because foot bones continue hardening through adolescence, the years between ages 3 and 12 are a sustained window during which ill-fitting footwear and constricting socks can affect natural arch formation and toe alignment.
What signs show that a child's shoes or socks no longer fit properly?: The APMA recommends watching for redness on the toes or heel after wear, signs of irritation, and uneven heel wear, which can indicate that shoes are too tight, too loose, or mismatched with the sock layer. Children who avoid activity, limp, or complain of foot pain should be evaluated by a podiatrist.