Red Dingo large dog harness The traditional side release buckle has been redesigned by Red Dingo to add the finishing touch to our nylon dog harnesses. Engineered in acetal plastic, like all Red Dingo products, Bucklebones embrace design without compromising functionality or strength. Bucklebones are registered designs. neck circumference : 46 - 76 cm chest circumference : 53 - 78 cm Sizes: Size Neck Circumference Chest Circumference Width Rear Strap Stomach Strap Small 25 - 39 cm 29 - 42 cm 1.2 cm 7 cm 10 - 14 cm Medium 35 - 53 cm 40 - 55 cm 1.8 cm 10 cm 14 - 22 cm Large 46 - 76 cm 53 - 78 cm 2.5 cm 13 cm 18.5 - 25 cm XLarge 62 - 109 cm 71 - 125 cm 2.5 cm 17,5 cm 25 - 37 cm Red Dingo harnesses Webbing - High density nylon woven tightly for maximum durability. Design Ribbon- High tenacity polyester woven as a single ribbon (not wire cut from a broadloom) and back bound. This is the most durable ribbon available. Seams - All seams are sewn (not welded) for maximum strength. Buckle - All harnesses come with an original Red Dingo Bucklebone buckle for dogs.