A belt buckle, in particular leatherware, includes a body having a first face and a second face opposite the first face, a prong mechanically connected to the body and a loop mechanically connected to the body, the prong and the loop being movably mounted relative to the body, and the buckle being configured to accept a first configuration in which the prong and the loop protrude from the second face and a second configuration in which the prong and the loop are displaced relative to the body and protrude from the first face.

A shoe with an adjustable upper structure, including a sole, an adjustable structure, and an upper provided on the sole. The adjustable structure includes a pin buckle and a woven strap. The woven strap is of a mesh structure and a plurality of woven perforations are distributed on the woven strap. The woven strap is detachably connected with the pin buckle in such a manner that a pin of the pin buckle is capable of passing through one of the plurality of woven perforations when the woven strap is passed through a buckle of the pin buckle. The pin of the pin buckle is capable of being inserted into a different one of the plurality of woven perforations to adjust tightness of the upper.

A shoe with an adjustable upper structure, including a sole, an adjustable structure, and an upper provided on the sole. The adjustable structure includes a pin buckle and a woven strap. The woven strap is of a mesh structure and a plurality of woven perforations are distributed on the woven strap. The woven strap is detachably connected with the pin buckle in such a manner that a pin of the pin buckle is capable of passing through one of the plurality of woven perforations when the woven strap is passed through a buckle of the pin buckle. The pin of the pin buckle is capable of being inserted into a different one of the plurality of woven perforations to adjust tightness of the upper.