The right ring for any moment. The Bead Ring Set is perfect for those who want a strong and long lasting erection. They are extremely flexible and comfortable to wear. Wear them together or separately. The two rings each have a diameter of 4 and 4.5 cm. The extra inward and outward ball bulges give these rings a unique feel. Material: 100% silicone. Diameters 1.6" (4.0cm) and 1.8" (4.5cm).