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