How to shop for second-hand kids' clothes like a pro

Keeping up with a child's constantly changing clothing size is both exhausting and expensive. When you add up the everyday basics, the seasonal outerwear, and the special occasion outfits, outfitting a growing kid can take a massive toll on your family budget.

The smartest, most sustainable parenting hack in 2026? Thrifting. With a few smart search strategies, you can dress your kids in premium labels for the price of high-street fast fashion. Here is how to shop for kids' clothes like a pro on Sellpy.

1. Shop one season (and size) ahead

The biggest mistake is waiting until the first snowstorm to buy a winter coat. Buy off-season and size up—shop heavy winter gear in spring, lightweight summer clothes in autumn. Demand is lower off-season, so you get the best selection and prices. Always buy one size larger than their current fit.

2. Set "saved searches" for cult brands

Premium kids' brands with recognizable prints (like Mini Rodini or Bobo Choses) sell out within minutes. Type the specific brand and your child's upcoming size into the search bar, then click "Save Search" for an instant alert the second a match hits our warehouse.

3. Utilize the "new with tags" filter

Parents frequently receive gifted clothing that's the wrong size, or buy new right before a growth spurt. Go to the Condition filter and select "New With Tags"—you'll be shocked how much brand-new children's clothing is available for a fraction of retail.

4. Filter for indestructible outerwear

Kids are tough on clothes, so choose pieces that survive the playground. Polarn O. Pyret is the gold standard for long-lasting cottons and outerwear. Also look for Reima, Kuling, and Didriksons for gear that survives multiple children.

5. Don't pay retail for occasion wear

Why spend €50 on a tiny velvet dress or miniature suit worn for one afternoon? Check Sellpy first—the platform is flooded with adorable, worn-once occasion wear that looks brand new, for under €15.

Do your kids have outgrown clothes you're no longer gravitating towards? Order a bag (code blogbags for 2 free bags), fill it, close it, ship it and we do the rest.