(1)Ideal Lip Shape: Clear lip contour with the lower lip slightly thicker than the upper lip. Size should harmonize with the nostrils and eye shape. Prominent philtrum, slightly upturned corners, and overall three-dimensional lip structure.
(2) Thick Lips: Well-developed orbicularis oris muscle and loose connective tissue result in thick upper and lower lips. Excessively high lip peaks may cause an outward-turning lip shape.
(3) Thin Lips: The vermilion borders of both lips are flat and thin, though the cupid's bow and lip arch remain distinct and smooth (common among Caucasians).
(4) Upward-Turned Corners: The corners formed where the upper and lower lips meet curve upward, creating a smiling impression—also known as "smiling lips." This shape is deliberately pursued during lip tattooing.
(5) Downward-turned corners: Characterized by the corners of the mouth forming a downward curve where the upper and lower lips meet, conveying a sorrowful or unhappy impression. This is a lip shape requiring significant adjustment during cosmetic tattooing.
(6) Pointed and Protruding Upper Lip: Characterized by a high, angular lip peak, a small, forward-projecting philtrum, an uneven lip contour, and thin lips that protrude forward.
(7) Receding Upper Lip: Normally, the upper gumline sits slightly ahead of the lower gumline. If the upper gumline recedes behind the lower, it creates a situation where the upper lip pulls back while the lower lip protrudes forward. This often results in a thinner upper lip and a slightly fuller lower lip.