This is another of "for over your RX" in a medium size tac polarized sun shield with full uva and uvb protection !  tac means triacemate coating which aides in scratch resistance .  each lens measures 63mm, 2 1/2"  by 1 1/2", and 5 1/4 " inside where your glasses fit in . see item specifics above for more details.  i use a corrugated shipping box and bubble wrap for a safe delivery. fast free shipping. please check my other items for many more vision products, and please add me to your favorites for quick access.