Thank you for your question. I think it is important to identify why you want to achive 9 mm of lift specifically? When looking at the actual margins, The distance between the nasal margin and the lower point of the upper lip is half the distance between the upper margin of the lower lip and the point of the chin. Therefore if the overall distance from the lower nose margin to the chin is say 3 cm in total, then the nose to upper lip margin would be 1 cm and the lower lip to chin margin would be 2 cm.In order to achieve the correct result for you, it would be advisable to see a surgeon who carries out a lot of these and can assess how much lift is possible. It might well be possible to achieve 9 mm if there is adequate skin laxity but this needs to maintain the correct facial proportions and symmetry. That extent of lift, with you r facial features, would result in two main effects. Firstly, it would make the lateral aspects of the lips (the points heading towards the corner of the mouth) more downturned and give a much steeper angle to the sides of your lips and secondly, it would result in a large proportion of your teeth showing. The effect of a pouty lip and teeth showing needs to be subtle enough to just show part of the two incisors but not the gums as well as this results in more of a gummy smile.I would advise you to see a surgeon who will assess your lips appropriately and determine what is in fitting with your facial features. Deciding how much you want to remove is not always th ebest way as this may distort the overall anatomy and not give you the result you desire.I hope this helps with your decision making.Best wishes