I have large, meat breeds. 10-12lbs.
24"×24" works for a buck or doe not intended to be bred. I use 30"×30" for does needing nest boxes and litters. Grow out pens or fryer pens should be abt 36"×30" or a little bigger.
Arba.net has cage size reccomendations or you can find their chart at Michigan state University website. Google arba rabbit cage size.
Sorry my tablet doesn't want to cut,paste the entire site address.