Table mats are the perfect addition to any dining table, but there are several alternative names for these useful items. Placemats, for instance, are a popular term used to describe table mats, and they can come in a wide range of designs and materials. A runner, however, describes a longer, rectangular mat that usually sits in the middle of the table and is used to hold dishes or decorative items. A coaster is another alternative term and is typically a smaller version of a table mat designed to protect surfaces from drink spills. Finally, a charger plate is a larger, decorative mat placed underneath a dinner plate to add style and sophistication to a formal occasion.