Purina Tidy Cats Standard Litter Box Liners Twelve (12) 4 ct. Box - Purina Tidy Cats Standard 22" X 30" with Ties Litter Box Liners Tear-resistant design keeps litter neatly contained Designed to conform to the shape of each litter box Formulated with a light, fresh scent for added odor control Liners stand up to regular use