plastic frame plastic lens polarized Lens width: 5.5 inches LensCovers are UV400, 100% UVA and UVB and polarized for your eye protection! Only LensCovers have been certified to meet ISO 12312-1:2013 quality standards. Available upon request. LensCovers are available in Extra Small, Small, Medium, Large Slim and Large. Each of the 5 LensCovers sizes are listed separately on Amazon. Each listing has an assortment of stylish frame colors and lenses. See measuring instructions below or the image with measuring diagram for selecting proper fit. A new easy printable measuring guide that allows you to place your prescription glasses into the LensCovers frames is now available, to get your copy: click on the “Sold by LensCovers - EZ Tofu Press and Fulfilled by Amazon” hyperlink. Then click on “Ask a question” button and request a copy.