Today, women's jeans have a more feminine cut and are generally tighter than men's jeans. In the United States, they also tend to be sized by a single number such as 4 or 8(men's jeans are sized by waist measurement and inseam length). jeans, trousers originally designed in the United States by Levi Strauss in the mid-19th century as durable work clothes, with the seams and other points of stress reinforced with small copper rivets. They were eventually adopted by workingmen throughout the United States and then worldwide. Jeans are a type of pants or trousers made from denim or dungaree cloth. Often the term "jeans" refers to a particular style of trousers, called "blue jeans", with the addition of copper pocket rivets added by Jacob W. Davis in 1871 and patented by Davis and Levi Strauss on May 20, 1873.