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