This ring holds 3 stakes together in a tripod formation. The inside diameter of the 2” ring is 1.5” and will hold up to three 5/8” stakes. If you have thicker stakes or use thick branches, the 2.5” ring with a 2” center diameter works beautifully. The picture with the fern background has a 2” Tripod Ring on Delphinium Stakes. The picture with 1” wood stakes has a 2.5” Tripod Ring. Your sweet peas and morning glory will never look so beautiful!