The standard and ideal lip shape should also match the nose, eyes and face shape in order to be harmonious. Viewed from the side, the midpoint of the upper and lower lips should be just on the straight line from the tip of the nose to the forehead (that is, to ensure that the lips are not crooked). The upper lip is slightly thinner than the lower lip, and the general plan is prominent in front of the lower lip. When the upper and lower lips are naturally closed, the length of the whole oral lip is 35~40mm, and the chick lines at both ends should be slightly upturned. The lip red center of the upper lip is about 10~ 13mm high. The lip valley of the upper lip should be located in the center of the whole upper lip, and lip bead should be located in the center of the upper lip. Its size, shape and lip shape are harmonious and natural, with symmetrical lip peaks on both sides, equal height and equal distance between the two corners. The angle between the lip ridge and the lip peak is moderate (that is, it will not be too angular). The curve of the labial arch fluctuates smoothly, and the curve radian of the lower lip should be gentle and slightly flat. In short, the ideal standard lip shape should be: the overall outline of the upper lip is clear, natural and smooth, and the lip color is healthy and rosy, giving people a delicate and charming sense of movement. However, in real life, not everyone is "born with beauty". In that case, the beauty of personality will be lost. Therefore, when designing a lip with decorative patterns, the ideal standard lip shape is only a reference coefficient. If you want to tattoo a lip shape suitable for everyone, you need to design it according to the conditions of a lip beautician, so that everyone can present a unique and beautiful personality.