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