usually under 15lbs, although some look bigger because of all that fluff If it is a quality dog it should be no larger than 8-10 pounds max. If it is much larger it is not a purebred That is not...
I'm not real sure if there is such thing as a breed like that, but maybe they create Rott-a-Pom's or something. They can, but it has to be a male Pom and female Rott or it could cause problems...