We are very glad and honored that you can choose our products. Your trust and support is our greatest affirmation. We are committed to providing high quality and fashionable dog products. Have any questions or dissatisfaction with the product, you can contact us at any time, we will be ready to answer for you. This martingale chain collar is available in three sizes, small, medium and large. Suitable dog neck circumference 10-27 inches.The dog collar comes in 12 different colors with multiple stripes. Blue, black, orange, purple, gray, yellow, green, red, rainbow, pink, etc.You can measure the size of your dog's neck and choose a suitable collar.It is suitable for all breeds of dogs, French bulldog, Teddy, Golden Retriever, sheepdog, pit bull, Rottweiler etc.