Size: Small links Diameter 2.25 mm and length 14-18 inch, M/L Diameter 3.5 mm and length 18-23 inch, X-L Diameter 4.0 mm and length 23-26 inch.
Note: Your dog’s neck size add 2 finger gap will keep your dog feel most comfortable.
Package includes: 1×dog collar, 20×protector covers, 2×extra links