Four Paws Wee Wee Patch Indoor Potty Expansion Kit 25.5"L x 23"WAdd this Expansion Kit to your Premium Patch Pet Potty (sold separately) to customize the perfect potty area for your dog! Simply connect and lock these tray panels for a larger, gap free potty. Intended for all kinds of dogs, the expanded pet potty patch system is a trusted solution for both indoor and outdoor use. From puppy potty training to offering your adult dog a dedicated place to go when you're not home, our dog potty patch expansion kit is