It's a matter of semantics; the only real difference between the meanings of those words is their social context not an anatomical difference.
No, she is slender.
slender
thin. slender.
...Seriously? Cuz he's Slender, meaning skinny, thin, etc.
skinny ( Apex)
I would use slender in place of skinny
skinny = dünn, mager.
Slim, skinny, slender.
Very thin Waiflike Slender
slender mender
Slender man
slender mender