Most listings show three primary types: pencils, gels, and liquid/pen formulas.
Features that produce hair-like strokes include ultra-fine (super-skinny) tips, triangular or precision tips, and flexible micro brush tips; some gels also contain hair-like fibers to enhance a natural look.
Listed net weights vary across products. Examples from these listings include .0 Ounces, .01 Ounces, .12 Ounces, .03 fl oz (US), and .31 Ounces.
Suggested ages in the listings range from as young as 10 years to 13+ and 17+, depending on the product.
Gels are often used alone to shape and add volume or applied as a topcoat over powder or pencil. Micro-tip pens are typically used to add hair-like strokes and can be paired with a brow glue or setter for a laminated finish.
Reviews commonly praise smooth, buildable application and reliable staying power, along with accurate color matching and convenient applicators. Value for money and ease of use are also frequent positive themes.