There are a few different types of dog leashes on the market these days. If one of our dog collars comes with a matching leash then it will be shown an the collar page towards the bottom of the page. These are a relatively newer type leash called the retractable leash. Once we used one we were hooked. They are wonderful. They work sort of like a fishing rod and reel. The leash extends out to the desired length. You can then lock it in place at that length or leave it be to allow the dog to walk around.