It’s all systems glow with this glow-in-the-dark anal training kit from Firefly. With three sizes of butt plug to enjoy, expand your experience level (and your back door) with the mini, small and medium butt plug in three gorgeous glowing colors. Simply charge your chosen plug (or plugs) under a lamp for a few moments before play, and then turn off the lights to enjoy it in all its glowing glory. More than a treat for your butt, this triad of toys glow in their daylight colours to satisfy your eyes with their yellow, pink and blue hues, even in the dark. Vital Stats: Mini Butt Plug: 3 inches in insertable length and 2. 75 inches in circumference. Small Butt Plug: 3. 75 inches in insertable length and 3. 75 inches in circumference. Medium Butt Plug: 4. 5 inches in insertable length and 4. 9 inches in circumference. So charge up, lube up, and show them that, actually, the sun really does shine out of your… you know.