MMSB, she's wearing a Small. And she's pretty hefty for a girl (almost 12 lbs). Normal girls would probably wear an XS. The buckles aren't bulky at all, no more so than other harnesses.
Susi, I just leave the nip sitting on the stairs and don't have any trouble with it. You might try planting some in a hanging pot, that would deter raiding varmints.
And thanks for the comments everyone.
Great video. So cute!
Susie- Be ware of hanging the nip, I did that once and the raccoon was found swinging from the darn thing! lol