Crocs Eyewear Frames CF3178 METAL/ GREEN (54-16-138) Brand NEW as seen in pictures. CrocsT Eyewear CF3178 frames have a rectangle shape, which helps to balance rounded facial features. Frame shape is the most noticeable feature of a pair of glasses, followed by frame color and frame size. Top brands always have a large collection of rectangle frame shape glasses, as well as oval frame shape glasses. CrocsT Eyewear CF3178 frames feature a fashionable full frame design, which is the largest component of designer eyeglasses brands collections. A rim all the way around the lenses, provides for maximum stability and durability. The frame has adjustable nosepads, a popular feature providing comfort and precision to any nose shape. Designed for adults, this model has a Regular type hinge for greater comfort. Standard skull temples can be easily adjusted to fit perfectly behind your ears. This frame has a total width of 130mm.