[coli]

hello, there, I was wondering who puts the weight factor when mating. Is it the male or the female. I read someplace it was the female, but i see that lots of people mate their female yorkies with smaller males.
Coli is seven pounds, but looks like 5 pounds and i think that finally i m going to buy a female yorkie whose weight will be around five pounds.
This is why i wanted to know who puts the weight factor or is it an average estimate between both weights. or does it have to do with wanting tiny yorkies.