1ADJUSTABLE LENgTHJOYEEIIOO collar is easy to adjust and suitable for puppies small medium and large breeds Available in 3 sizes S(45x105-13) M(10x13-165) L(10x165-23) Please make sure leave 2 fingers between neck and collar 2URABLE & SAFETYThis wear- and tear-resistant material makes sure the dog collar will make you happy for a very long time Silky soft polyester webbing dog collar and heavy-duty hardware for superior strength wont loose or fray Safer and more secure than prong collars this collar tightens when your dog pulls -loosens when he stops pulling to help make sure that the collar is never too tight-increase control Alternative to choke collar 3REFLEcTIVEersonalize your pup with rich fashionable colors red purple black green pink white Highly reflective threads keep high visibility at night Vehicles can find your dogs from distance and walking in the dark would be safer The martingale collars have a secure fit to help prevent dogs from escaping or barking out of the collar 4QUIcK RELEASEQuick release buckle for easy on-off-made from high-quality sturdy plastic The plastic buckle is curved for your dog comfort Our metal D ring for attaching dog leash and ID tags Recommended by vets and trainers as the best design for daily wear 5cUSTOMER SERVIcE If you are not satisfied with the dog collar we will provide a 100% refund service If you have any questions please consult our customer service immediately and we will provide assistance within 24 hours