Popular Lip Filler Styles Explained: Soft Natural, Korean, Krajub, Cherry, Russian, Heart, and M-Shape Lips
Terms like "soft-fai style," Korean lips, "Korean-trend style," natural lips, Krajub lips (Thai heart-shaped ideal), Cherry Lips, Russian Lips, Heart Shape, M Shape, and Sexy Lips aren't official medical technique names — they're descriptive labels for a desired result. Each style comes from adjusting the same underlying anatomical elements differently: upper-to-lower lip height proportion, the shape of Cupid's bow, the curvature of the vermilion border, and where volume is concentrated (centrally or laterally). A physician with strong anatomical understanding can design toward any of these desired looks while still respecting each patient's existing structure, because the same lip style doesn't necessarily suit every face.
Why There Are So Many Names for "Lip Shapes"
I understand that when patients come in for a lip filler consultation, they often arrive with a list of terms seen on social media — soft-fai style, Korean lips, Krajub, or Russian Lips. These names aren't official medical technique terms; they're descriptive labels that emerged from people describing results they found appealing.
Behind every one of these styles lies the same set of anatomical principles: the height proportion between upper and lower lip, the shape and definition of Cupid's bow, the curvature of the vermilion border, where volume is concentrated (centrally versus laterally), and the height of the lip tubercles. Each style simply weights these elements differently, creating a distinct look in the eyes of the observer.
Getting to Know Each Style
Soft-Fai Style
This style prioritises maximum naturalness, using minimal filler volume focused only on genuinely deficient areas, such as the corners of the mouth or a thinning lip border from age, without significantly altering the lips' original shape. It suits people who want a subtle increase in fullness that others won't notice as "done."
Korean Lips
Popularised by Korean beauty influence, this style emphasises soft, gently full lips with a gradient colour effect, rounded rather than sharply defined Cupid's bow, giving a sweeter rather than dramatic impression. Volume is usually distributed evenly across the lips rather than concentrated at any single point.
Korean-Trend Style
This term is often used for people deeply into Korean beauty trends, who typically want a lip shape closely resembling a specific favourite idol or actor. In practice, physicians must adapt this to the patient's own facial structure and existing lip proportions rather than replicating a reference image exactly, since everyone's facial structure differs.
Natural Lips
This style prioritises respecting existing lip structure above all else — not changing the shape, but restoring volume lost with age or gently improving symmetry, resulting in a look that reads as one's own lips, simply fuller.
Krajub Lips
This is a traditional Thai term describing the Thai beauty ideal — a clearly defined Cupid's bow resembling the shape of a Krajub shell, tapering to a point at the centre, with a moderately full lower lip that's neither too thick nor too thin. This style is popular among patients seeking a classic Thai aesthetic.
Cherry Lips
This style emphasises round, plump fullness resembling a cherry, with taut, dimensional-looking lips. Volume is usually concentrated centrally, giving a bright, cute impression, often paired with a glossy finish to enhance dimension.
Russian Lips
This style has a distinctly recognisable look — emphasising height and a steep angle in the upper lip, with a flatter base than other styles, giving a doll-like appearance. Cupid's bow is typically designed with sharp, defined angles. This is a technique requiring high precision in filler placement, since the resulting structure differs considerably from a naturally shaped lip.
Heart Shape
This style emphasises a sharply defined Cupid's bow so the upper lip reads as heart-shaped when viewed from the front, usually with added volume along the philtral column area for extra definition. It suits those who want a focal point at the centre of the upper lip.
M Shape
This style emphasises sharp definition on both peaks of Cupid's bow, creating a clearly visible "M" shape from the front. Unlike Krajub or Heart Shape, it prioritises angular sharpness over soft curvature, suiting those who prefer a lip shape with clean, defined lines.
Sexy Lips
This style emphasises overall fullness across both upper and lower lips, with a sharply defined vermilion border, creating a sensual, dimensional look. It typically involves more volume than the other styles on this list, suiting those wanting a clearly noticeable change.
The Same Style Doesn't Suit Everyone
I want to emphasise this point specifically, since it's a common misconception. Many patients bring in a reference photo of a style they love, expecting to achieve an identical result. In reality, a lip style that looks beautiful on one face may not suit another face's proportions at all, since it depends on other factors too — jaw width, the distance between nose and lips, and tooth shape, which affects how the smile looks.
The best approach is to bring a reference image to your consultation as a way to communicate the overall "feeling" you want, then let your physician assess and adapt the proportions to your actual facial structure, rather than trying to replicate the reference image exactly.
Final Thoughts
Popular lip styles seen on social media — whether soft-fai, Korean, Krajub, Cherry, Russian, Heart Shape, or M Shape — all stem from adjusting the same anatomical elements in different proportions. Choosing the style that suits you best should start with consulting a physician who understands both current beauty trends and your individual facial structure, so the result is both aesthetically pleasing and genuinely harmonious with your face.