TLDR Korean men in their 20s and 30s most commonly have an inverted U-shaped hairline.
In 2011, a study was conducted on 200 Korean male adults in their 20s and 30s to determine standard hairlines and their shapes. The study found that the most common hairline shape for both age groups was the inverted U-shape, with 53.3% in their 20s and 59% in their 30s. The M-shape was more common in men in their 30s than in their 20s, with an increase of more than 10%. The study also measured the length of 11 vertical index lines from various points on the face to the hairline. The findings from this study could be useful for planning hair transplantation and postoperative evaluation. However, the study was based on photogrammetry, so there may be differences between the actual distance of a curved face and the projected distance on flat photographs.
Cited in this study
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21 citations
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January 2000 in “Aesthetic Plastic Surgery” Researchers created a new system to classify male baldness, finding six types and a common hairline shape, to improve hair loss treatments.
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August 1998 in “International Journal of Dermatology” Genetics and hormones cause hair loss; finasteride treats it safely.
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July 2018 in “Dermatologic Surgery” The study found that most donor sites are good for hairline restoration in Southeast Asian women, but hair characteristics should match for a natural look, and aging can reduce hair density and diameter.
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April 2017 in “International Journal of Dermatology” Different areas of the scalp have varying hair thickness, useful for different types of hair transplant needs.
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April 2011 in “Dermatologic Surgery” The new hairline classification and correction methods can improve the appearance of Asian women with wide or M-shaped foreheads.
21 citations
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January 2000 in “Aesthetic Plastic Surgery” Researchers created a new system to classify male baldness, finding six types and a common hairline shape, to improve hair loss treatments.
