16" x 9"-- Even though I read the measurements, I guess it didn't click because this was small and very oddly shaped. A very thin, long rectangle, best suited for a ferret Heh! Or a tea cup pup breed like a Yorkie. Otherwise, it is nicely made, I just can't comment on anything to do with it's use as it was too small for my standard mix feline (less than 4 lbs) $18 seems a bit much for the size. Shipping was good as always, of course.