I have a cat. She has been with the family for more than 10 years now and after her second year, her size hasn't changed in the slightest. It would be interesting to know what breed she is, but we got her from someone I never met, I am far too lazy to bother searching, and it may just be an alley cat in the end.
We call her "Nike" since she use to sleep in our old sneakers as a kitten. She is stubborn and likes to hog the bed, so after a few years of struggling and fighting, I finally decided to get her her own couch so she wouldn't keep nipping at my feet. Call it absurd if you will, but who can sleep with that going on all night?!?