Euro stickers first came into use in the late-1960s. Because European license plates looked much the same, the stickers provided a way to distinguish from which country travelers hailed. Some are easy to understand—A for Austria, F for France. Others are not—CH for Switzerland? In the United States, such stickers have been used to indicate where travelers have been, such as OBX (Outer Banks) or HH (Hilton Head). Leave no doubt as to where you’re from with the new, 4×6-inch KY sticker.