How big can be a Teacup Cavapoo? Cavapoo puppies size depends upon the dimensions on the mother and father. A King Charles Cavalier bred by using a Toy Poodle is generally approximated to generally be 50 % in the blended mother and father weighs; give or take a several lbs. Our Teacup Cavapoos are approximated to vary involving 7 lbs & 15 lbs absol