We have 3 sizes to choose from,small medium large dog collar length can be adjustable.
S Fit for Neck 12"- 18"( 30cm- 45cm), Width 3/5" (1.5cm) ;
M Fit for Neck 14"- 22"( 35cm- 55cm),Width 3/4" (2cm) ;
L Fit for Neck 16"- 26"( 40cm- 65cm), Width 1" (2.5cm) ;
Please measure your dog carefully and choose the right collar size. Always look at the size chart for the recommended neck girth and weight range to confirm the size.(There is usually two fingers of space between the collar and the dog's neck.) This helps prevent your dog from chewing on the collar.