Which factor is crucial in determining the texture of hair?

The diameter of a hair strand is crucial in determining hair texture because it directly affects the way hair behaves and its overall appearance. Hair texture generally refers to the thickness or fineness of individual hair strands, and is categorized as fine, medium, or coarse.

Fine hair has a smaller diameter, which can make it appear softer and more delicate, while coarse hair has a larger diameter, giving it more body and a sturdier feel. The diameter also influences how the hair interacts with styling products and techniques, as well as how it responds to humidity and environmental factors. Understanding the diameter helps professionals in the hair design field to choose appropriate products and methods for styling, cutting, and treating the hair effectively, ensuring the best results for their clients.