Clip-On Flip-Up Plastic Sunglasses - Smoke Lens/ Circle Shape Legs have proprietary coating to protect ophthalmic lenses and prevent shifting and scratching New leg profile to fit both metal and plastic frames 100% UVA and UVB Protection Lens mesures approximately 2.5 x 2 inches Clip on sunglasses can invisibly turn your prescription eyeglasses into polarized sunglasses!