A long sock is a type of hosiery that extends above the ankle and typically covers the lower leg, up to the knee or mid-thigh. However, there are many synonyms for the term "long sock". These include knee-highs, over-the-knees, calf-length stockings, thigh-highs, and leg warmers. Knee-highs are a type of long sock that reaches just below the knee, while over-the-knees extend slightly higher. Calf-length stockings are longer than knee-highs, but shorter than thigh-highs. Thigh-highs, as the name suggests, extend all the way up to the thigh. Leg warmers are long socks that are typically worn over leggings or tights and provide extra warmth during colder weather.