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Socks, Underwear, Accessories for Kids

Find the Best Kids’ Socks, Underwear and Essentials at Costco

Find the best accessories for kids at Costco! Save money and time by stocking up on multi-packs of kids’ basics like socks and underwear, youth sports bras, and more. Our kids’ essentials are made of high-density, dependable fabrics that combine cloud-like softness with a precision fit, ensuring long-lasting quality and comfort. Start shopping today!

Soft, Durable Socks for Long-Lasting Wear

Upgrade your child’s wardrobe with the best kids' socks from Costco, where high-performance engineering meets playground-ready durability. Our selection features everything from sensory-friendly seamless toe socks to cushioned athletic socks that provide crucial arch support and impact protection. Choose from various silhouettes including no-show liner socks, sporty kids’ crew socks, and classic knee-high and calf-length socks—all crafted from premium materials like breathable cotton and cooling bamboo. Whether you're stocking up for school with multi-pack ankle socks or looking for non-slip gripper socks for toddlers, our selection of boys' socks and girls' socks delivers exceptional comfort and style.

Premium Quality Underwear for All-Day Comfort

Stock your child’s dresser with kids’ underwear multi-packs from Costco. We offer a variety of silhouettes to suit every child, including girls’ cotton panties in classic briefs, girls' bikini underwear, and trendy hipsters, as well as boys’ boxer briefs engineered with a performance fit for active play. Eliminate irritation and chafing with our organic cotton underwear, comfy tagless designs, and seamless construction. Made from shrink-resistant and durable fabrics, our kids underwear ensures a perfect, stay-put fit throughout the day.
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