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