* Straight hair: Will appear closer to the full 3 inches in length.
* Wavy hair: Will appear slightly shorter than 3 inches.
* Curly hair: Will appear significantly shorter than 3 inches, as the curls take up space.
* Coily hair: Will appear much shorter, perhaps only an inch or so, as the hair is tightly coiled.
So, while the length is always 3 inches, the *appearance* of that length varies.