The difference between knickers and breeches, historically speaking, is primarily in their timeline, length, fit, and intended use. Breeches came first, emerging in the 16th-17th centuries as close-fitting garments ending just below the knee, often secured with buttons or buckles, and were standard formal menswear through the early 19th century. Knickers (or knickerbockers) appeared later in the 19th century as looser-fitting garments also ending below the knee but with a more relaxed cut through the thigh and seat, initially designed for sporting activities and becoming particularly popular for golf, cycling, and outdoor pursuits by the early 20th century. While both garments terminate at a similar point on the leg, breeches were typically worn with tall stockings for formal occasions, while knickers were often paired with patterned socks for a more casual, sporting look.