Our Leather Sport Collars are made with an "O" Ring in the center to offer a quick, easily accessible place to clip your leash. These are great for the avid outdoors person or an everyday collar. If there is a size you're looking for that we don't have listed please reach out to us. Custom orders are our specialty!  Questions on sizing?  For these collars, please measure at line #3 on the dog silhouette.  For more info visit our sizing page!  Since each one is custom made by hand to order so please allow two weeks for shipping.