China people's natural double eyelid width is generally 6 ~ 8 mm.. When you go to the hospital for medical treatment, you can tell the doctor your satisfactory double eyelid width. In order to ensure the effect of the operation, the doctor must also confirm the width in the same way and decide the operation after careful discussion with the beauty seeker. ? The method of designing the width of double eyelids for you is as follows: First, mark the width. First, measure the width of 7 mm from the eyelid margin with a ruler above the pupil of both eyes, and make a mark with a colored pen. Step 2: Gently press the mark with a toothpick or a thin matchstick. At this time, a double eyelid line can be formed on the eyelid. If this line is not obvious or narrow enough, you can pull the toothpick horizontally to the corner of your eye to check whether it is satisfactory. If it is considered too wide, you can repeat the above actions at 1mm below the mark until you are satisfied.