Halloween // What costumes are considered cultural appropriation?

Yes I’m an ignorant white girl who has lived in a 99% caucasian town whole life who isn’t confident in knowing what’s considered cultural appropriation.

I was thinking of being a person from the Stone Age, like the Flinstones era. (I have freeform dreadlocks so I figured that would be accurate for the costume).

Would that be considered cultural appropriation?

Can you give me examples of cultural appropriating costumes?

I know Native American costumes are a no-no