Firefly Halo 60mm e or approximately 2.36 inches Cock Ring Large Clear. Firefly Halos are glow in the dark cock rings made of soft and stretchy silicone for a snug and comfortable fit, ensuring prolonged performance and enhanced climax. Available in assorted colors and sizes. Collect them all! Product dimensions2.4 inches by 2.4 inches by 0.4 inch. Material Silicone.