My 10lb chubby chihuahua can’t wear anything but Sherpa products because he itches with other stuff so I’ve been on a mission to find a onesie with Sherpa. Plus he is short statured and stocky so he has issues fitting stuff. His legs tend to come out of clothes and his chest is hard to find stuff to fit perfectly. So having all theses issues I have been on a mission to find that perfect onesie and I’ve found it finally. It fits all the criteria’s perfectly. Not to tight and not to loose. It not to thick and not to thin but just right to keep his body temperature normal. His one back leg does tend to come out after he’s been laying down and getting up quickly but I’m sure that’s with any onesie.NOTE: THESES DO RUN BIG! My baby wears a medium usually so I first bought a medium and when it arrived it was WAY TO BIG, LIKE A LARGE SIZE. So I bought a small. THE DIFFERENCE IN SIZE FROM A MEDIUM TO A LARGE IS HUGGGGE! I am so happy I decided to give it another chance and glad I did with the small size. I recommend this to anyone who wants their baby to be comfortable and happy all day long. My 10lb chubby chihuahua can’t wear anything but Sherpa products because he itches with other stuff so I’ve been on a mission to find a onesie with Sherpa. Plus he is short statured and stocky so he has issues fitting stuff. His legs tend to come out of clothes and his chest is hard to find stuff to fit perfectly. So having all theses issues I have been on a mission to find that perfect onesie and I’ve found it finally. It fits all the criteria’s perfectly. Not to tight and not to loose. It not to thick and not to thin but just right to keep his body temperature normal. His one back leg does tend to come out after he’s been laying down and getting up quickly but I’m sure that’s with any onesie.NOTE: THESES DO RUN BIG! My baby wears a medium usually so I first bought a medium and when it arrived it was WAY TO BIG, LIKE A LARGE SIZE. So I bought a small. THE DIFFERENCE IN SIZE FROM A MEDIUM TO A LARGE IS HUGGGGE! I am so happy I decided to give it another chance and glad I did with the small size. I recommend this to anyone who wants their baby to be comfortable and happy all day long.I also bought a XS for my 6 lb skinny chihuahua who has long legs and she usually wears a small size. I’m happy the small fit her perfectly just like her brothers small onesie. NOTE: THE DIFFERENCE IN SIZE FROM MEDIUM TO SMALL IS HUGE JUST LIKE THE DIFFERENCE IN SIZE FROM MEDIUM TO SMALL. I bought my baby girl the red one and she’s so comfortable and warm in it. My little girl love to wiggle herself out of her clothes and get her arms out but this makes it super difficult for her to do and I am happy. I love snuggling with them while they are wearing it. Out of all the outfits I bought theses are the best quality, price, fit and purchases I’ve ever made.