I made this hay rack/box from leftover coro. It's 30 inches wide, 9 inches deep at the top, 2 inches deep at the bottom, and 11 inches tall. The litter boxes are veggie baskets and tubs. This has worked so well. I put wood pellets on the bottom tub, put the basket in place, add hay. It keeps hay and poop separated from the litter. It's so easy to clean. I just take the basket out, dump it and wipe then add some hay. The basket/tub is 10x13 inches, perfect size for each pig.