Here is another cat home that you can put in your IKEA shelves to provide your kitties with a comfortable place to hide and relax. This Thick Felt Cat Cave for IKEA Shelf is machine washable and retains its shelf. It folds down to 2 inches thick. The interior pillow is removable.
The cube measures 12.5” wide, 12.5” tall, & 13.5” deep.