French cuff
A French cuff or double cuff (primarily British) is a cuff on a dress shirt that is closed using cuff links instead of buttons (it is a link cuff), and is twice as long as a single cuff, but worn folded back on itself.
Instead of cuff links, French cuffs can also be closed with silk knots, sometimes called monkey's fists, which are cheaper. Silk knots tend to be better known in Europe than in North America. Cuff links and silk knots exist solely for shirts with link cuffs, either double or single.
French cuffs were once considered to be more formal than button cuffs, although they are seeing a resurgence in the business environment. Traditional dress required that french cuffs be worn with a tie and jacket. However due to the emergence of business casual, french cuffs are now being worn without tie or jacket. French cuffs are generally preferred for formal black tie events.
French Cuffs are becoming a more popular fashion option with the current generation of young professionals, this can be observed by the rise in selection of french cuff dress shirts and cuff link sales from traditional clothing retailers.