Rrruffler Pupkin Patch Decorative Collar/Costume for Dogs Size x-s = 8-10" neck, S = 10-12" neck, M= 12-15" neck, L= 15-17" neck, XL = 17-20" neck Made in the USA Elasticized neck; Super easy to put on and take off Your dog will love wearing it! Look for other great pet fashion without the fuss with the Original Rrruffler