Thanks for the quick response! I think I got the smallest size available and according to the size chart it's what she falls under for girth measurement. It's the one with the chi on the cover and it's a grey strap. The next size up was a red which was a small.
I'll just have to keep this harness in mind when I get future dogs as I'm sure it would work on them but not my current girl.

Thanks again for the review! It was greatly appreciated.