Firefly Contour Plug Medium Blue by NS Novelties. Firefly’s Contour Plugs are sexy, smooth and playful. The perfectly designed Glow in the Dark anal plug for skyrocketing pleasure and exciting discoveries. Body safe Silicone Suitable for all lubricants. UPC 657447102660. Product dimensions 3.78 inches by 2.91 inches by 1.1 inches. Package dimensions 6.93 inches by 3.39 inches by 1.46 inches. Packaged weight 1.80 ounces.