The litter box is a whooping 24" x 20" x 5" with a 3" opening from the floor on the 24" side. The litter box and the scoop are made of 100% polypropylene, BPA-free. The litter is all natural pine pellets with no additives. The construction is sturdy and durable to withstand your pets daily use, even a new puppy! These three items are essential to training your new puppy to successfully use a litter box. The training guide included will help you set up your new puppy for success. Many puppy parents like to use puppy pads and this pad holder will help keep the pad and spills off your floor. Understand, before buying this kit, that puppies need training, praise, confinement or close observation. You should expect it will take as long to train your puppy to use a litter box as it would to train you puppy to go outside on your schedule. Please write with any questions before buying.