15" x 15" for necks up to 14"
*Example Breeds: French Bulldog, King Charles Cavalier, Dauchsunds
21" x 21" for necks up to 21"
*Example Breeds: Golden Retriever, Bulldog, German Shepard, Poodle
*example breeds are only a guide, each specific dog within a breed ranges in size and may fall outside of the norm.