Easily add bifocals to any pair of sunglasses, safety glasses or goggles with Optx 20/20 Stick-On Bifocals. They're easily applied to any style of eyewear with water. When dry, they stay firmly bonded even in wet conditions, yet can easily be removed and reinstalled to other eyewear. A great solution to expensive prescription sunglasses. Includes a manufacturer guarantee against process and material defects. Size: 1.2" diameter. Made in USA.