Abstract: A clasp for fastening together opposing distal portions of upper and lower segments of flexible material, such as the straps of a shoe or sandal. The clasp has an upper part pivotally connected to a lower part by a hinge structure comprised of portions of proximate sidewalls of the parts, and a clip structure comprising an outwardly facing recess in a distal sidewall of one of the parts and a resilient inwardly arched section of a distal sidewall of the other part arranged to snap into and engage the recess when positioned opposite thereto. This snap action secures the upper part to the lower part in a closed position of the clasp. The lower part includes a holding pin mounted on a bottom wall of the lower part for insertion through corresponding holes in the flexible segments to prevent relative movement between these segments when the clasp is closed.