Crew socks are longer, reaching up to the middle of the calf, offering extra coverage and support to keep your toes warm. When you pull on a pair of crew socks, you'll notice they provide a snug fit that stays in place, making them perfect for boots or cooler weather. Regular socks, however, stop around the ankle or just below, offering a lighter, more breathable option for everyday wear, particularly with sneakers or casual shoes. The primary difference lies in the length and fit, with crew socks providing more coverage to keep your toes warm, while regular socks offer a more minimalist look.