Cufflinks are jewellery pieces that are used to accessorize the cuffs of shirts. They are designed only for shirts that have cuffs with buttonholes on both sides but without buttons.
The visible part of a cuff link is often monogrammed or decorated. There are many styles: new, traditional or contemporary. Cufflinks can be and have been worn with casual, informal and business suits, up to very elegant styles such as semi-formal and ceremonial outfits, where they become essentially necessary and match beautifully shirt buttons.