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