I love that this sweater has a turtle neck to keep my pup warm. He's a 6 month old Boston terrier around 15 pounds and the Medium fits perfect. Sizing up as the website suggests worked for us. We also can pair this with his GF parka on really cold days.
This sweater is so cute. Our dog does not love putting it on but once it's on it keeps him warm and he's comfortable. He does not care for cool weather and this works when it's a bit too warm for jacket weather. It's very soft.