Heles Retro Pure Tianium Half Rim Glasses Optical Frame Eyeglasses, very light in weight, 51/17/138 Titanium frame glass lens non-polarized Lens width: 51 millimeters Lens height: 35 millimeters Bridge: 17 millimeters Arm: 138 millimeters 100% Pure Titanium, very light in weight Half Rim Gender: Women Size: Lens/Bridge/Temple:51-17-138 millimeters weight: 14 g , Width: 135 millimeters(5 millimeters adjustable)