Ooh, well, now that I see her body pictures, she definitely looks Lhasa. My breeder handled Lhasas from time to time but I never paid much attention to them. Ironic, huh? LOL. I never really got a chance to examine their heads/noses, so I can't tell you exactly what a Lhasa's nose should look like under all that hair. However, there could still be a slight chance that she is part Pekingese because I doubt Lhasas are supposed to have those wrinkles and underbite, whereas both are unique characteristics of the Peke. Plus, if I'm not imagining things, it looks like there's a slight slant from her bottom jaw/chin backwards to her forehead, like this ---> " / ". Is there?

As for measurements, my Peke is grossly over the standardized height and weight and weighs in at a hefty 19-20 pounds and stands at 10" or so at the withers. I haven't measured in a long time, but that's what I think his measurements are. Lhasas stand at a taller height, so it would make sense that your pup stands at 12-13". I haven't measured Lucky's length in awhile, but both Pekes and Lhasas are much longer than they are tall. The underbite is definitely either a defect or a Peke characteristic. I'll take a picture for you tomorrow, but Lucky's lower jaw extends at least a 1/2" forward and his front teeth sit on his gums. I hope this helps you