Belts have been documented as male clothing since the Bronze Age. Both genders have used them off and on, depending on the current fashion. In the western world, belts have been more common for men, with the exception of the early Middle Ages, late 17th century Mantua, and skirt/blouse combinations between 1900 and 1910. Art Nouveau belt buckles are now collectors' items.
In modern times, men started wearing belts in the 1920s, as trouser waists fell to a lower line. Before the 1920s, belts served mostly a decorative purpose, and were associated with the military. Moreover, prior to that trousers did not even have belt loops. As sportswear, trousers with belt loops were already present in the 19th century. Today it is common for men to wear a belt with their trousers.