Sigma Beauty is an American makeup brand that only sells brushes on its website, with a focus on brush sets and individual brushes as a supplement. It has a wide variety of models and is famous for its 12 professional brush sets, each with a corresponding number. Sigma Beauty has excellent exterior design and wool quality, with high cost-effectiveness. Although it is affordable, its quality can be evenly matched with MAC genuine brushes, and it is loved by many beauty artists and experts.