The neck is 12" and the chest is 14 1/2". and 81/2" from nape to base of tail. There is a picture of my yorkie wearing a green sweater , and another in a yellow sweater (but alittle longer) in the ads. Same size. You can get a picture of what it will look like. The sweaters are new. Just put it on my dog so you can see how it looks. Happy Holidays!