When it comes to progressive reading glasses, frame size is an important consideration. Certain frames will work better for certain progressive lenses. It is important that frames are tall enough for the entire range of vision provided by progressive lenses to fit within. Frames with a very short lens will likely not fit progressive lenses well; aviators and cat-eyes are also poor choices, as they will minimize the area of the reading lens. Look for frames at least 30mm tall to give you the best progressive glasses experience.