* Thickness refers to the diameter of individual hair strands. Think of it as the width of a single hair. Someone with thick hair has strands that are wider than someone with fine hair.
* Volume refers to the amount of hair on your head. It's about the density of the hair and how much space it takes up. Someone with a lot of hair will have more volume, even if their individual strands are thin.
Here's a simple analogy:
Imagine you have two boxes, both filled with straws.
* Box 1: Contains thick, chunky straws. This represents thick hair.
* Box 2: Contains thin, delicate straws, but there are many more of them. This represents fine hair with volume.
Even though the straws in Box 2 are thinner, there are so many of them that the box is still full.
In short: You can have thick hair with little volume, or fine hair with a lot of volume!