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