DIY placemat ideas are sure to be the perfect addition to your table decor. These DIY placemat ideas really bring the table together and infuse each table setting with holiday cheer and thoughtful detail. A pretty table runner laid down the length of a table can serve as both decoration and place mats. A placemat is a necessary thing for a table setting, no matter if it’s a usual breakfast with your family or a party dinner with colleagues or friends.