cats and doll houses
The term 1/6 scale refers to the size of fashion dolls (AKA Barbie). Barbie is 1/6 the height of a human. 11 1/2 x 6 = 69 inches or 5 feet 9 inches.
The cats I've owned have all loved my Barbie doll houses and cases. The kitties have been very curious when I bring home another house or case from a garage sale, not just because of the scents of the previous owners, but because the cats like to curl up in the structures. They're just the right size for a kitty to move in!
And the kitties give me such sad disappointed looks when I take them out of the house or case!
I am assuming that the average domestic household cat is also 1/6 scale to a human.