Notice: If you are using a long leash, and your large dog is prone to sudden full speed lunges, you do not need this type of collar. You need a collar with a metal buckle, not plastic. If your dog drags you with the leash, use a metal buckled collar. If your dog is very powerful, and is hard to control on a leash, NEVER USE ANY TYPE OF PLASTIC CONNECTORS! NOTICE #2 PRIOR TO ORDERING LEARN HOW TO USE A MEASURING DEVICE. KNOW HOW BIG OR SMALL YOUR DOG IS BEFORE ORDERING. IF YOU NEED HELP, PLEASE SEND ME A PICTURE OF YOUR PET, AND THEN I CAN DO THE WORK FOR YOU. IF NOT, THEN READ THE DIMENSIONS OF THE COLLARS. THIS SHOULD BE CLEAR AND APPARENT. IF YOU DO NOT KNOW HOW TO USE A MEASURING DEVICE, YOU CAN’T SEND ME A PICTURE OF YOUR DOG, THEN THERE IS NO HOPE FOR YOU IN THE FUTURE. PLEASE SEEK HELP IMMEDIATLY! We have reflective collars with all metal hardware also!! Check our store for other pet items!!!!Material:nylonCollar Type:ReflectiveApplication:Dogs,CatsPattern:StripedFeature:Eco-Friendly Brand Name:ADR Model Number:EX-ORC0001Color:Orange, Blue, GreenSize:S,M,L,XLsizeBelt Width(IN)Collar adjustment(IN)Suitable weightSS#21.0.5″8″-12″9-13.5″+/- 20lbsM1.010″-15″+/- 20-40lbs LXL 1.0″1.0″12″-19″14″-23.5″+/- 40-75lbs+/-75lbs up