[Design for Apple Airtag]-- The airtag dog collar with airtag holder case is professionally designed for GPS tracker Apple air tag. (Note: AirTag is not included) [Comfortable fit]-- Air Tag dog collar made of soft lightweight polyester dog collar and silicone Apple air tag holder case, makes your dog feel relaxed and comfortable when wearing. [Perfect Match]-- Three different sizes of air tag holder case match three sizes of dog collars, the collar straps go through the airtag holder case, airtag case will hold on the collar firmly without shaking and moving. Our airtag air tag dog collar and silicone waterproof airtag holder can be disassembled and used separately too. [Pretty Pattern Design]-- Specializes in designing unique and stylish patterns for air tag dog collar. From teacups to large dogs, we design three pretty lovely patterns: purple demon flower, red watermelon, blue bearperfect for girl, female, boy, male dogs. [Adjustable Dog Collar Size]-- There are 3 different options of dog collars size for you to choose from. S( Width 0.6'' , Neck size 9-15'' ); M(Width 0.8'' , Neck size 13-21'') ; L( Width 1'' , Neck size 16-25'' ). Note: Please measure the width of your pets neck before purchasing, keep one finger between its neck and the tape, always allow for adequate breathing room.