This is a 2x4.5 grid cage (28"x64" ) that is fleece lined with closet shelving used as a lid.

I've had different types of C&C cages in the past (double stories, crazy ramps, etc), but this one is probably my favorite because it's so easy to clean. I have extra little squares of fleece where Wheeker likes to poop during the day, so I can easily spot clean the cage twice a day.

The shelving also makes for a much better lid than anything I ever made out of cubes (the bungie cords are for extra support, since my little cat sits on it).