Will the size be biased? Nancy 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? How do I know if the frame size fits me? How to choose frames? Frame Size and Strong Rx Comments 0 comments Please sign in to leave a comment.