These fit over most size prescription eyeglasses! Each eyepiece gives your glasses a "pocket" of approx. 2" of vertical room at the widest (middle of eyepiece) part before the foam padding begins. (Each actual lens measures approx. 2" vertically and 3" horizontally in diameter). Frame is vented to help prevent fogging. Lenses are shatter resistant polycarbonate, UV400, and also have a special anti-fog coating! These have a very flexible frame and come with a soft micro-fiber pouch! Inside of goggles has padded foam for comfort on your face. Available in SMOKED, CLEAR or YELLOW lenses or as an "Interchangeable Kit" with one or two sets of clear, smoked, or yellow extra interchangeable lenses!!