At Revant Optics, we understand the importance of accurate measurements in finding the right fit. Most frames contain lens size information written on the arms. If the original writing remains on your frames, like in the image below, you can use this to determine the best lens fit!
However, as frames age, the writing can wear away leaving the frames without vital information! No problem at all! Simply use this guide to measure the lenses within your frames.
If you would like more information about lens sizes and how to find the right size frames for your face, check out this link: How to Measure Sunglasses: A Step by Step Guide