Will the size be biased? Dave November 27, 2019 14:58 Updated Follow The size may have a difference less than 2mm due to the difference of angle and the measuring tool. Related articles How do I make sure the frame size is right for me? What should I do if the frame doesn't fit me well? Do you have spring hinges glasses? Do the frames come in different sizes? How do I know if the frame size fits me? Comments 0 comments Please sign in to leave a comment.