: Align the long edge horizontally with your eye line. Determine your size :
: The card edge extends past the outer corner of your eye. buy sunglasses by size
: Stand in front of a mirror and place the short edge of the card against the center of your nose. : Align the long edge horizontally with your eye line
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 buy sunglasses by size
: The card edge ends before reaching the outer corner of your eye. Understanding Sunglasses Measurements