Skinny curve rectangle shape NON polarized lenses. Non polarized lenses make it easier to see your dashboard and electronic devices outside. For the skinny curve rectangle shape to fit your glasses, your glasses need to be a narrower rectangular shape with your frame rim measuring less than 3mm's thick. Please measure one lens of your glasses carefully to the outside rim of your glasses width x height. We have many different sizes available and only one will fit your glasses, so it is very important to measure your glasses correctly. The skinny curve rectangle shape needs to be nearly the same shape as your glasses and the size clip-on sunglass needs to be the same as the measurement of your glasses or the next size bigger. To help with sizing, we have printable templates for the skinny curve rectangle shape at Sunglass Rage but there isn't a way to upload the templates here so measuring your glasses carefully is very important. All of our sunglasses and clip-on's are rated UV400 protection which is up to 100% protection. We include a microfiber pouch to store and clean your lenses.