Type:Tactical Dog Collar Adjustable Military Collar Outdoor Training Dog Collar Heavy Duty Metal Buckle with Control Handle Durable nylon with soft padded liner,comfortable and breathable to wear Hook & Loop design,for size adjustment,also you can put some patches,stickers High quality zinc alloy buckle and D ring,corrosion resistant and not easy to rust Quick control handle design,also can be fixed when not in use For the buckle,you can open it by press it's both sides up,when you lock it, just push it gently. Suitable for outdoor sports, training, travel, camping and hunting, durable dog training collar Fit for medium large and extra large dogs SizeNeckWidth M14-19"(36-48 cm)1.5"(3.8cm) L16.5-21"(42-54 cm)1.5"(3.8cm) XL19.5-24.5"(50-62cm)1.5"(3.8cm) Tactical Dog Collar Military Training Pet Collar with Strong Control Handle M-XL Tactical Dog Collar Type:Tactical Dog Collar Adjustable Military Collar Outdoor Training Dog Collar Heavy Duty Metal Buckle with Control Handle 4 Colors:Black/Green/Brown/Camouflage Material:Nylon with Soft padded Features: Durable nylon with soft padded liner,comfortable and breathable to wear Hook & Loop design,for size adjustment,also you can put somepatches,stickers High quality zinc alloy buckle and D ring,corrosion resistant and not easy to rust Quick control handle design,also can be fixed when not in use For the buckle,you can open it by press it's both sidesup,when you lock it, just push it gently. Suitable for outdoor sports, training, travel, camping and hunting, durable dog training collar Fit for medium large and extra large dogs,e.g.Bull Terrier/Samoyed/Husky/Chow Chow/Bulldog/Pitbull/Labrador/ German Shepherd / Rottweiler /Golden Retriever/Afghan Hound/German Doberman pinscher/Mastiff/Alaskan Malamute/Boxer/Rottweiler/Dalmatian/Saint Bernard/Old english sheep dog.etc. Size: Size Neck Width M 14-19"(36-48 cm) 1.5"(3.8cm) L 16.5-21"(42-54 cm) 1.5"(3.8cm) XL19.5-24.5"(50-62cm) 1.5"(3.8cm) Note: Please measure the neck size of your dog before you make an order,thanks . Please allow 0.5-1 inch(1-3cm) error due to manual measurement.