Bought this to finish off matching set of collar, leash & Halter for our Pomeranian. Her measurements are neck 12 in, under front legs & around body 19 in, down the back 16in. She weighs 11 lbs. the small/medium halter fits her. It is adjustable. Easy to put on & take off. She acts & walks like it’s comfortable. It’s very well made, quality stitched, holders up after machine washing & great soft color/pattern. She has worn it on 12 hr vacation car ride while safely tethered in her booster seat with no complaints. Important to say she’s worn for long hours on vacation without it rubbing any sore patches on her. Just pay special attention to your fur baby to know when to loosen halter on long trips & make sure halters are never too tight. Seller is small family owned business & has been very customer friendly. I will certainly buy from them again.