Considerably the oldest surviving wedding tradition, throwing the bridal garter is still practiced at weddings today. This tradition, like the bouquet tossing, was and still is thought to bring good luck to whoever catches it. It is also said that whoever catches the garter and bouquet are the next to marry.
It started in 16th century France. The bridal party needed proof of consummation, so they would approach the newlywed couple's bedroom to obtain an item of the bride's clothing. This not only confirmed that the deed was done, but was for good luck as well. This item of clothing was usually the garter - the item used to hold up the bride's stockings.
Jump ahead to modern times, and you'll see the wedding garter toss has yet once again evolved. During the wedding reception, the groom reaches under his bride's dress and removes the garter. Sometimes this act is flirtatiously done with his teeth. He then tosses it over his shoulder to the awaiting group of unmarried men. It is said whoever catches it is the next to marry. The man who catches the garter sometimes slides it on the leg of the woman who caught the bride's bouquet; ensuring good luck for the two of them.
The style of wedding garters has evolved over time as well. Though the ancient garter was a lacy white, nowadays they are available in a variety of colors. Many brides choose to wear a blue garter in the tradition of wearing "something blue." This symbolizes good luck, loyalty and fidelity. Most wedding garters are also available in two-piece sets. The keepsake garter, which is more intricate and 'prettier' is worn beneath the thinner and more simple tossing garter. This is especially convenient for couples who want to save the garter for sentimental values.