My hair is thin, I can wrap a hairtye around it like 3 times I have a friend who can only do it once 😧 She has super thick hair and it takes her forever to style it!
I found this answer on the internet.
"It means a lot or not a lot of strands; fine and coarse are the thickness. Thick hair can have more volume but be harder to take care of, thin is easier to style."
Sounds like it might be right, but you might want to find other resources.