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: The card edge ends before reaching the outer corner of your eye. Understanding Sunglasses Measurements

: Align the long edge horizontally with your eye line. Determine your size : buy sunglasses by size

Most sunglasses list three key numbers in millimeters (e.g., 52-18-140) on the inside of the temple arm: Sunglasses and Eyeglasses Size Guide - Mia Burton : The card edge ends before reaching the

: Stand in front of a mirror and place the short edge of the card against the center of your nose. buy sunglasses by size

: The card edge aligns exactly with the outer corner of your eye.

: The card edge extends past the outer corner of your eye.