XXL glasses are just that, Extra Large Glasses. Extra Large glasses are for people who are livin' large. Urban, athletic and classic large eyeglasses styles in eye sizes from 51 to 63mm in the eye size, with extra big and long temples. XXL eyeglasses are big eyeglasses. If you are a big guy, you can appreciate having a pair of big glasses that do not pinch the sides of your head.