DALIX Crystal Ascent Reading Glasses Frames Specs 54-17-143 (Black, Brown) composite frame plastic lens non-polarized Lens width: 54 millimeters Lens height: 35.5 millimeters Bridge: 17 millimeters Arm: 143 millimeters SIZE: Eye: 54 MM X Bridge:17 MM X Arm Length:143 MM Vertical B: 35.5 MM Superior Material: composite Rx-Compatible: The Special Grooves of this Frame allow you to replace the lenses of this frame with prescription lenses from your eye doctor/optician Accessories: Hard Carrying Case & Micro Dust Cleaning Cloth Provided with Each Purchase Color: Black-Gradient