Prime Day 2026 Opens a Back-to-School Stock-Up Window for Kids' Socks
Key facts
The National Retail Federation's 2025 Retail Returns Landscape report, published in October 2025 in partnership with Happy Returns, projects that 19.3% of all online purchases in the United States will be returned this year, totaling $849.9 billion in merchandise across all retail categories. Apparel runs consistently above that average, and a Coresight Research survey of apparel brands and retailers identified size or fit as the single most-cited reason for returns, named by 53% of respondents. For parents buying children's clothing and socks online, those numbers reflect a familiar frustration: a wrong size on a multi-pack purchase means an avoidable return that costs time and, depending on the retailer, shipping fees.
- 19.3% of online purchases in the U.S. are projected to be returned in 2025, per the NRF and Happy Returns 2025 Retail Returns Landscape report.
- Size and fit is the top reason for apparel returns, cited by 53% of apparel brands and retailers in a Coresight Research survey.
- Close to two-thirds of consumers admit to "bracketing," ordering multiple sizes of the same item and returning those that do not fit, per the NRF report.
What it means for parents
Children's clothing sizes carry an extra layer of unpredictability compared to adult apparel. There is no national standard behind terms like "4T," "kids' small," or "size 6," and a label that fits one child at a given age may be too large or too small for another child of the same age. That inconsistency pushes return rates for children's items higher than the already-elevated apparel average. Parents who rely on age alone as a size guide, especially when purchasing online without the option to try items on, are more likely to receive a product that does not fit.
For socks specifically, the sizing logic is slightly more predictable. Sock size is driven by foot length rather than body weight or overall build, which means a brand that publishes a clear foot-length chart in centimeters or inches gives parents a reliable reference point. The practical implication is direct: measuring a child's foot before ordering, and cross-referencing that measurement against the brand's published chart, is the most straightforward way to avoid a return on a basic everyday item. Parents who skip that step and order two or three sizes to "try them out" contribute to the bracketing behavior the NRF identifies as a significant driver of return volume.
Background and context
Returns have become a structural feature of online retail rather than an occasional inconvenience. The NRF has tracked U.S. retail return volumes annually for years, and the projected $849.9 billion in 2025 follows $890 billion in 2024. The online return rate of 19.3% is roughly double what retailers see in physical stores, a gap that reflects the fundamental limitation of purchasing without being able to inspect or try on an item first. For children's apparel sold through e-commerce, where parents make decisions based on product photos and written size guides rather than a fitting room, that gap is especially pronounced.
The bracketing behavior the NRF documents compounds the logistics challenge. According to the report, close to two-thirds of surveyed consumers admit to at least one costly return behavior, and ordering multiple sizes of the same item is among the most common. Major retailers have responded with virtual try-on tools and size recommendation features, but none of those technologies fully resolve the absence of standardized sizing across the children's apparel industry. Until industry groups or regulatory bodies establish common children's sizing standards, the most dependable approach for parents remains the same: locate the specific brand's foot or body measurement chart, use a tape measure, and buy once based on that measurement rather than on an age label.
Takeaway
The NRF's return data is a reminder that online sizing friction is not a niche inconvenience. It costs the U.S. retail system close to $850 billion a year, and parents of growing children absorb a disproportionate share of that friction every back-to-school season. For everyday basics like socks, checking a brand's published foot-length chart in centimeters or inches before adding a value pack to your cart is the most reliable way to buy the right size the first time and avoid the return process entirely.
Sources
Frequently asked questions
- What is the best way to find the right sock size for my child?
- Sock sizes for children are typically based on shoe size or foot length, not age. Measure your child's foot in centimeters and match that measurement to the brand's specific size chart, since sizing varies between manufacturers. For crew socks in the toddler-to-tween range, a measured foot length is more reliable than an age label, particularly for fast-growing children who may be between standard sizes.
- Why do children's clothing sizes vary so much between brands?
- There is no national standard for children's apparel sizing in the United States, so each brand sets its own measurements independently. A size labeled '4T' or 'kids' small' can represent meaningfully different dimensions across manufacturers. The NRF's 2025 Retail Returns Landscape identifies sizing inconsistency as a key driver of the 19.3% online return rate for all merchandise. Checking a brand's specific measurement chart before purchasing is the most reliable way to avoid a return.
- How early should I start buying back-to-school socks and basics to avoid sizing problems?
- Consumer research suggests starting back-to-school basics shopping 6 to 8 weeks before the school year begins, typically in late June or early July. Buying early leaves time to exchange or reorder items that do not fit before the first day of school. Because children's feet grow quickly, measuring foot length again closer to September helps confirm that socks purchased weeks earlier still fit correctly.
