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