The most popular eyebrow stenchers, which have become popular in Korea, cost up to US$2,500 and require a skilled eyebrow maker.
They can make eyebrows look thinner or longer, or even extend them, without adding makeup or hair.
This year, the cost of a custom-made eyebrow kit, which requires a professional eyebrow artist, has climbed to about US$1,000.
But Korean cosmetics makers are getting creative, too.
One brow makeup maker, Joongjin, announced plans last month to make brows “sexy” by using “eyebrows from the stars,” which can be used as eye shadow, mascara, lipstick and other cosmetics.
Some of the most popular brows include eyebrows made from silk and feathers, feathers from a butterfly or bird and other animal hairs.
“You can get any animal hair you want,” said Choi Sung-woo, founder of the cosmetics company.
“They look very natural.”
In China, cosmetics makers have also begun to experiment with eyebrow shapes.
Last year, a cosmetic brand called Beauty Republic released an eyebrow product that included the “starfish” shape.
The company, which is based in China, said the shape of the fish’s “eyes” could “bring beauty to any face.”
Beauty Republic also sells eyebrow wax and eyeliner.
“In China, eyebrows are often called the center of the universe,” said Lee Hyun-seung, a researcher at the Korea Institute of Science and Technology.
“We can use eyebrows to show the beauty of beauty.”
It’s not clear if Korea is the first country to embrace the idea.
A 2009 survey found that in China and the United States, more than half of Koreans had tried eyebrow stenching.
But most of the products have been limited to brows and eyebrow glue.
Many eyebrow products are made with artificial ingredients, including titanium dioxide, titanium dioxide emulsifiers and titanium dioxide.
There are no FDA-approved cosmetics for eyebrow surgery, so it is difficult to measure how effective the products are at improving eyebrows.
“I think Korean cosmetics companies have to be aware of their market and adapt,” said Kim Kyung-seok, a dermatologist at the University of Maryland School of Medicine.
“It will be more difficult to convince Korean consumers that eyebrow shape is the key to their beauty.”