Chase just turned a year old last month, and he is about 15.5 lbs. I'm not sure if he's done growing, but we are fine with him being so big. It's actually a joke between myself and my boyfriend. When I first told him I wanted a yorkie, he asked how big they are. I told him I wanted one around 6lbs, and he said he wanted one 15lbs. I told him they didn't get that big