A boutonniere is a small floral decoration worn on the lapel of a suit or tuxedo, typically by men. It is often made from a single flower or a small cluster of flowers and is commonly used during formal events such as weddings, proms, or other celebrations. The boutonniere is usually pinned to the left side of the jacket. Traditionally, the groom and his groomsmen wear boutonnieres that match the wedding flowers or the overall color scheme. In addition to weddings, boutonnieres can also be worn at other special occasions, such as graduations or ceremonies, to signify importance and add a touch of elegance to formal attire.