Our cat safety collars are 3/8" wide and come in 3 different sizes (but can be made larger if needed). We start with a base of strong, supple leather, and attach a trim to one side (usually ribbon). We only use break-away clips when we make our cat collars for the safety of your pet. Because of this, we do not add d-rings for leashes as the 2 should never be combined. Break-away clips will "pop" open with enough force or twisting to ensure that your cat does not strangle if snagged. But we do add a bell for bird safety. Visit our store (don't let our name fool you!), and see what we have to offer you and your pet.