3 new boxes of large cat pan litter liners.

Brand new unopened 3 boxes of Petmate large cat litter box liners. Each box has 12 liners. 36 liners in all! Size is 31.75 inches by 17.5 inches. Fits litter boxes 18.5 inches x 15.5 inches x5.5 inches. Makes litter box clean up super easy. Bought the wrong size.