How is the diameter of hair measured?

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Multiple Choice

How is the diameter of hair measured?

Explanation:
Diameter refers to how thick a single hair strand is across its width. In practice, we describe this thickness as thick (coarse), medium, or thin (fine). This labeling directly communicates the cross‑section size of the hair, which matters for how hair responds to chemical services and styling—thicker strands behave differently than very thin ones. So the best way to express hair diameter is thick, medium, thin because it names the actual width of the hair, not its length or surface texture. The other descriptors relate to length or texture and don’t indicate thickness.

Diameter refers to how thick a single hair strand is across its width. In practice, we describe this thickness as thick (coarse), medium, or thin (fine). This labeling directly communicates the cross‑section size of the hair, which matters for how hair responds to chemical services and styling—thicker strands behave differently than very thin ones. So the best way to express hair diameter is thick, medium, thin because it names the actual width of the hair, not its length or surface texture. The other descriptors relate to length or texture and don’t indicate thickness.

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