Abigail is 9 pds and she is bigger than I wanted her to be but she is so great. She has a really good personality and she is really pretty. Summer on the on other hand is really small. She is probably between 3.5 and 4 pds. I had her spayed bc she is so tiny so she has gained some weight since then so she is probably closer to 4 pds now but thats fine with me. I think the ones that are anywhere between 4 and 7 pds are a really good size. It seems like that is the most common size. But it is hard to judge by weight how big a yorkie is. Abigail doesn't look like she is 9 pds. she is really long but very skinny. I am very happy with both of my girls.