These are the breed standard weights for the lop breeds (i do like the tiny lop giant lop big eared lop idea though!)
Mini lop ideal 3lb4oz, max 3lb8oz
Dwarf Lop ideal 4lb8oz. min 4lb4oz, max 5lb4oz
German Lop Min 6lb8oz, max 8lb8oz
French Lop min 10lbs
Hope that helps
jessy