Akoni exclusive Color: Dark Crystal Brown Frame Size: 52-21-140 Hinges: Custom titanium hinge plate with threaded tube screw system and custom screws and washers Lens Properties: 6 base, cat 3, High contrast CR- 39 with three layer anti-reflective coating Model: Libra Nose Pads: Molded Temples: Japanese acetate Frame Color: Dark Crystal Brown Frame Material: Acetate Frame Shape: Rectangle Frame Type: Full Rim Type: sunglasses Gender: Unisex Style: Casual Manufacturer: Akoni Authenticity At EyeOns.com, we offer 100% original Akoni eyewear from Japan crafted with attention and precision from top-rated materials. Explore our great selection of Akoni eyeglasses and sunglasses to get an original frame that arrives with a genuine package, documentation, and certificate. Trust EyeOns to get authentic eyewear designed for your personal needs and style! Size Guide Frame Size Guide: How To Measure Your Eyeglasses 1 Lens width 3 Temple length Bridge width Distance lenses RASIA 501/TS 58015 130 2P The first number- the lens size - represents the horizontal width of the lenses. Generally, the eye size of most eyeglass frames ranges from 40 mm to 62 mm. The second number - the bridge size — is the distance between the lenses. In other words, it's the size of the "bridge" of the frame that rests on your nose. In most cases, the bridge size of eyeglass frames ranges from 14 mm to 24 mm. The third number — the temple length - is the length of the "stems" of the frame, measured from the frame hinge to the back tip of the temple. Temple lengths generally range from 120 mm to 150 mm. Often a small square (rather than a dash) will separate the eye size and the bridge size on the frame. Overview Dark Crystal Brown (110B) Sunglasses (AKS-110B-52) by Akonit Size: 52-21-140, Shape: Rectangle, Material: Acetate. Specifications 00 Lens Width: 52 mm 00 Bridge Width: 21 mm Temple Length: 140 mm