Just how long do these furbabies keep growing???

Mia is 28 weeks (6 1/2 months) old and seems to still be growing! Two weeks ago she was at the Vets office, we took her weight & measurements - he comment "oh she won't grow much anymore". Then last week I had her at the groomers, and they all said "oh yea she's fully grown". Well, I took her measurements just about 10 days ago for an order with Shana and then took them again for an order with Jodi - and it's till changing. I've measured her several times at different times of the days, had my hubby measure etc. I didn't order any of these things earlier cuz I wanted to make sure she was pretty much up to her full size.
BTW she was only 1 pound 11 ounces when I got her @ 9 weeks old
And of course they told me she would be "tiny" by people who had never seen her mother or dad! We don't care about her size, I just hope she doesn't grow out of the new dresses before she has a chance to wear them! Or some of you will being some good sales!
Anyone else have this happen to them??