I have been looking for long lasting and strong collars for my two dogs and I found the right ones. I purchased YAKEDA Collars in size small, medium and large since my dogs are still puppies and I was not sure if they may be too small or too big for them. As soon as I received the product, I put them on. Amazingly size small and medium were a bit big for my dogs but these collars are adjustable so they fit them perfectly. I did not need to try size large on them since medium and small worked fine. The cool thing about these collars is that each one comes with a leash. Something else that interested me was the color (black camouflage). I can't even tell they are wearing it. The material they are made of is durable nylon webbing which feels really strong. Also, the collars come with thumb clip for extra security. I am very happy with these purchases.