Size of collars: 30 inch 17 inch 39 inch 32 inch 15 inch 19 inch 35 inch 23 inch medium 34 inch 37 inch 25 inch 22 inch 40 inch 27 inch 16 inch 20 inch 36 inch 24 inch Small 29 inch 21 inch 38 inch 26 inch 31 inch 14 inch 18 inch large 28 inch 33 inch
Use: Police/Military K9 training Walking and daily use Search & Rescue Obedience training Training For working dogs All weather