This set of 12 different colored cords for eyeglasses are brightly colored and made of tough nylon material for keeping your spectacles securely on your head. Ideal for students, adults or seniors who wear sunglasses, eyeglasses or reading glasses. Full set comes in a wide range of colors. Please note, colors may vary. Ideal for those with visual impairments who require glass eyewear for playing outdoor sports, these tethered cords help secure spectacles when jogging or playing ball sports. These eyeglass cords are easy to apply according to your head size, glasses shape and glasses size, allowing you to find a color appropriate to your personal preferences. Length: Approximately 24.40 Inches.