Belt buckle for a 100mm elastic band

A two-piece belt buckle to hook together. The end of a 100mm wide stretch elastic band is fitted into each buckle section without sewing. To do this, the strap is folded into a U, pushed through the slit from below and fixed in place with the pin. The strap then lies around the pin and stays in place even when pulled hard. The length of the belt can therefore be easily adjusted.