Hair texture (in analysis) refers to:

In hair analysis, texture refers to the diameter or thickness of the individual hair strands — usually classified as fine, medium, or coarse. Texture affects how the hair responds to services: fine hair may process chemicals faster and hold styles differently than coarse hair. Texture is separate from density (the number of hairs per area). Correctly distinguishing texture (strand diameter) from density (amount of hair) is a common analysis point, because the two together guide product strength, technique, and styling choices.