Baby knee socks are commonly cotton or cotton blends. Listings often show plain cotton or blends with nylon and spandex for stretch and durability; one frequent example is 80% combed cotton / 15% nylon / 5% spandex for softness and stretch.
Many listings label socks as infant or toddler and provide size ranges such as: S (newborn, 0–9M), M (infant, 9–18M), L (toddlers, 2–4T), and XL (little kids, 4–6T).
Listings typically use explicit height labels. Many baby socks are listed as “Knee High,” while some tights or leggings are labeled “Over the Knee.”
Baby knee socks are sold as single pairs and in multi-packs. Common options include 3‑packs, 5‑packs, and 6‑packs, depending on the listing.
Common construction features include reinforced toes, comfort front tabs, seamless or flat stitching, and elastic for stretch. Decorative details on some styles include ruffles and ribbon bow-knots.