These are well made sunglasses, very solid, high quality materials, and they provide excellent optical clarity. Most sunglasses need some tweeking but these fit great right out of the box. They are a bit heavy, but the fit is so good they feel comfortable for hours at a time. And the lenses are superb, crisp and clear images and details only polished glass can provide. The 55 mm size is right for average faces. My petite wife wears the 52 mm and you macrocephalics out there will want the 58 mm.