Generally speaking, 5~7mm is the appropriate width, but you should tell the doctor how wide I want. It's really useless to cut eyebrows. You should know that the harmony of human facial features is the best, and girls should choose according to their own temperament. If the eye shape is long, narrowing the double eyelids should not achieve the effect of brightening the eyes, while if the facial features are small, cutting the double eyelids will only make you lose your aura.