With Raw, they each get roughly 8-12 ounces twice per day... sometimes 1-2 lbs in one meal for the whole day, and light meals or a fast the next day. Gonzo always gets a few ounces more than Fozzie.
When they're fed The Honest Kitchen, they get about 1/2 lb (hydrated) twice per day.
When it's kibble (usually Taste of the Wild, Natural Balance, or Innova), they get 1 cup twice per day. Actually, Fozzie gets about 3/4 cup and Gonzo gets about 1 1/4 cups.