This service medal is designed for smaller dogs. The size of the tag with the clip is 2 6/8 inches. The medal its self is 1 inch around. This medal is double sided and the lobster clasp clip is very easy to take off a collar or harness. Service dogs perform are essential actions, like guiding people with visual impairments, signaling certain sounds for those who are deaf, retrieving items for people with mobility issues or alerting about impending cardiac episodes or seizures. Service dogs are protected by federal law and this service dog tag medal will help show other people that you have a service dog.