Peppermint Flea & Tick Collar repels bugs and is an added layer of protection against fleas and ticks for up to 4 months, mosquitoes up to 1 month. Use with Flea & Tick Pets + Home spray to protect your pet. Active issue? Collar doesn’t kill bugs. Use Flea & Tick sprays for pets, home and yard as directed

Cat:Designed to comfortably fit all cats

Small/Medium Dogs:Fits necks 9.5″21″.
Large Dogs:Fits necks 13.5″26″.

Looking for ourOne Size Fits All Dog Collar?That size is now listed asSmall/Medium.