Measure Your Glasses First - This clip on sunglasses measures 5.28 in/134 mm in length, 2.32 in/59 mm in lens length and 1.57 in/40 mm in lens width. Make sure it can fullly cover your glasses lens, please measur your glasses size before you buy it. HD Polarized Lenses - Polarized lens can filter out high-glare light from oncoming headlights, street, and other reflective surfaces. These special lens make objects clearer and brighter. UV400 Protection Lens - Remarkable Eye Protection and Comfortable Eye Vision Experience. With high quality UV400 Standard lens-100% UVA&UVB Protection and shatterproof. Easy Application - Just clip on and go! Great for cycling, driving, running, fishing, racing, skiing and climbing, trekking or other outdoor activities.