Traditionally, the engagement took place during a ceremony called Thong Mun, when the man presented a gift of gold to his fiancee. The ceremony was attended by parents, relatives and friends. The gold was likely to be in form of a necklace, measured in weight using a system called the baht (also the name of the currency used in Thailand.) One baht of gold is the equivalent of 1 troy ounce, or about 15 grams. A minimum of 2 baht is given, but never an amount that is not divisible by two. The fianceed couple are henceforth referred to as "Kumun" until they are married. The engagement may take place well in advance of the wedding, or it may be precede the wedding on the same day.