Socks are a fun and easy knit for babies - choose from a range of classic solid colors or bright self-striping yarns. For baby’s first socks only the best and softest quality sock yarn will do: Baby Smiles My first REGIA is an extra soft version of the popular, durable and easy-care REGIA sock yarn. In three sizes for feet from 4 to 4 ¾ inches (10 to 12 cm) long.