It fits my 5. 2 lb Yorkie perfectly. ...
582100
It fits my 5.2 lb Yorkie perfectly.  I can't wait to take my little pup on a trip.  It arrived timely and Vera Bradley never disappoints with the quality.
283156
But not too tight that it will choke my Lola. A small fit my pomchi perfectly everywhere except the neck. It is very pretty, but because of that it will be going to my cousin's yorkie pup. Not disappointed at all...with dog apparel sizes vary
1230670
I like it. I have two yorkies. I just wish they made a backpack big enough for two small dogs.
4698563
It's perfect for my miniature Dachshund.  Anything larger than 10 pounds might start to get uncomfortable for both the dog and the wearer. I also have a 16 pound dog, and she's a bit too big to fit comfortably.  She just puts her hind legs in and puts her front paws on my chest.  It does the job it's supposed to, though.  I love the material.  It feels like a comfy sweatshirt.  I love the wide strap, too.
2564028
I have a 6lb Yorkie. Fits him very well, as most are too deep for him to comfortably stick his head out without choking. Straps ARE NOT adjustable but it fit me, I'm 5'6", though it would be nice to adjust for different positions. Very breathable. Only reason I knocked off a star is because the liner is a soft plastic material, I wish it was more of a cotton/cloth for comfort for the pup.
1975179
This is an awesome vest. Its cute, its well made and it is sized accurately! It fits my 7-8 pound Yorkie perfectly! It is a bit bulkier and longer on my Yorkie than it appears in the photo, but  its features and bulk definitely inspire confidence.

It might take a while for my dog to appreciate it--right now he just stands there, pretending he is paralyzed, but I think with some fun outings he will grow to tolerate it, if not really love it.
3976151
Oh my gosh. I just got this right now- it is amazing!!!! At first I was little hesitant about buying clothes online, but it looked too cute to pass. Anyways, I got size S and it fits my dog perfectly. I have 7lb Yorkshire Terrier about and 12 inches body size. The sweater is warm and slightly long, but it will be perfect for winter. A must buy!!!
4549489
This is a great shirt. I like the higher collar on it and the little extra fabric on the back end. I bought an xs for my 6.5 pound yorkie and it fits perfectly.
3241695
love it! I went by the size chart and it fit my dog perfectly! It's so cute on him! I have a 11 pound Yorkie. Will be ordering another one!
2175508
I got this for my 4lbs yorkie and quite frankly I thought this was smaller, its actually pretty big! Which is awesome because it can be use for a bigger fur babies. I'm super excited and happy with this product's quality. I'm sure my baby yorkie is too
1510493
I have a Yorkie mixed and the small fits perfect, not too tight
3177677
Yay!!! Finally, a harness that fits my yorkie puppy! She weighs just under two pounds and none of the harnesses at Petco or Petsmart fit. The harness is comfortable too, we just put it on and she already naps in it. Velcro seems sturdy enough so far.
375419
This is so adorable on my 2.5 pound Yorkie.  I have to say that she keeps coming out of the back legs so even the XXS is a little too big for the super tiny dogs but it's still really cute!
298176
.So I ordered this over a year ago for my yorkie -- it is perfect - so easy to put in and out of car seat -- perfect height for him to look out the window-- then we got a second yorkie and I contacted the company to request an additional strap since they are both 5 lbs. and could easily fit in the one seat.  They got back to me that they do not sell replacement straps but they would send me one free of charge.  What great customer service.  Now they both ride in the seat together and it is great.
2108552
I have a Yorkie and she is a mini and she only weighs 6 pounds and the XS fits her perfectly,
4335337
I have a Westie and Yorkie, both are outfitted in PUPPIA products.  Ordered this product hoping that the small would be a perfect fit for my 8 pound Yorkie.  Let's say perfect when you need to make adjustment around waste and left room for him to breath around neckline.  Buying more of these products!
2037948
I love this on my Yorkie poo! She loves it too. It fit just right and kept her warm. We basically shaved all of her fur off for the summer, but then it was rainy and cold for 2 weeks so I ordered this and she is so comfortable in it. And the fact that it looks awesome on her is a bonus. She's a pretty gnarly dog.