Size: 21" x 21" or larger Vets best Floor Protection Dog Pad Holder is a must-have accessory for homes that depend on training pads. In addition to simply holding your puppys training pad in place, it prevents tearing and shredding of the pad, and keeps urine from flowing over the edge of the pad and onto your floors. Ingeniously simple design sets up simple and easy in three steps, and holds any training pad 21 inches by 21 inches or smaller. Make potty time less of a mess.