The boys' cages was a 2x4 with a 1x2 loft built on top of the girls' cage. My husband said it was too hard to clean, and I thought they needed something bigger, so here it is. I just finished it last night, so I haven't had time to sew the skirting to hide the cinder blocks. It's a 3x4x2x2x1x2 L-sha