This is a fully personalized and engraved waterproof outdoor dog collar with a name plate, specifically for small dogs. This dog collar utilizes a buckle style closure, similar to a belt buckle. Sizing is given as a range of neck lengths and also a total length. Because of the durabilit of the urethane coating, you can actually cut the collar down or add holes for the buckle using common tools. To size this collar, measure your dogs neck size or its current collar length (not including buckles).