YSK The three sets numbers on the inside arm of your eyeglasses are in millimeters for: lens width, nose bridge width, and temple length. Adjust size accordingly to your face and its features.
from /r/YouShouldKnow
YSK The three sets numbers on the inside arm of your eyeglasses are in millimeters for: lens width, nose bridge width, and temple length. Adjust size accordingly to your face and its features.