Cufflinks are items of jewelry that are used to secure the cuffs of dress shirts. Cufflinks can be manufactured from a variety of different materials, such as glass, stone, leather, metal, precious metal or combinations of these. Securing of the cufflinks is usually achieved via toggles or reverses based on the design of the front section, which can be folded into position. There are also variants with chains or a rigid, bent rear section. The front sections of the cufflinks can be decorated with gemstones, inlays, inset material or enamel and designed in two or three-dimensional forms. Cufflinks are designed only for use with shirts that have cuffs with buttonholes on both sides but no buttons. These may be either single or double-length ("French") cuffs, and may be worn either "kissing", with both edges pointing outward, or "barrel-style", with one edge pointing outward and the other one inward so that its hem is overlapped. In the US, the "barrel-style" was popularized by a famous 19th-century entertainer and clown, Dan Rice; however, "kissing" cuffs are usually preferred. Design Closing mechanism Cufflink designs vary widely, with the most traditional the "double-panel", consisting of a short post or (more often) chain connecting two disc-shaped parts, both decorated. Whale-back and toggle-back cufflinks have a flat decorated face for one side, while the other side shows only the swivel-bar and its post. The swivel bar is placed vertically (aligned with the post) to put the links on and off, then horizontally to hold them in place when worn. The decorated face on the most visible side is usually larger; a variety of designs can connect the smaller piece: It may be small enough to fit through the buttonhole as a button would; it may be separated and attached from the other side; or it may have a portion that swivels on the central post, aligning with the post while the link is threaded through the button-hole and swiveling into a position at right angles to the post when worn. Links of knotted brightly colored silk enjoyed renewed popularity in the 1990s, joined by an elasticated section. Motif The visible part of a cufflink is often monogrammed or decorated in some way, such as with a birthstone or something which reflects a hobby or association. There are numerous styles including novelty, traditional, or contemporary. Cufflinks can and have been worn with casual wear, informal attire or