These magical glow-in-the-dark Firefly Knee Highs capture the simple joy of warm summer nights catching bugs—like catching a falling star. Wearing these knee highs, you are surrounded by your very own galaxy made of the bioluminescent creatures- better than any Nightlight! Hold them up to light or walk outside in the sun before turning off the lights to watch the special thread glow. These deep royal blue and black knee highs feature a summer evening scene and are covered with fireflies released into the night sky complete with shooting stars. These knee highs are super stretchy, up to 21 inches in circumference without distorting the graphics. These knee high won’t fall down, no matter your leg size. Fits women's shoe size 5 to 14.5 and men's shoe size up to 13. Content: 59% cotton, 38% polyester, 3% spandex.