The Fresh Patch (Large) is a 24" x 24" inch dog grass pee pad and is designed for pets who weigh between 15 and 30 lbs. Fully disposable with no parts to clean -- simply dispose of the entire unit when a new one arrives at your doorstep.  It's a great choice if you're looking for a balcony potty for dogs. The most common subscription is delivery every (2) weeks.