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