I recently needed readers to get me through eye surgery and have seen them advertised and actually spoke to a person who had a pair which convinced me to try them. I am thrilled I bought them. Just need to measure your head with a tape measure, choose the particular glasses and order. I learned that the headband self-measuring will make the band close to the head so add some length for more space if you desire. When I received them I was really happy, they are built sturdy, the nose magnet is strong and when you need to remove them just pull the glasses apart at the nose piece and they can hang on your chest. Once I get my new prescription I will definitely order a prescription version.