A frilled hairband usually worn with a maid uniform. The stereotypical maid uniform has a single upright standing frill like in post #2661396.
Note that not every character wearing a maid headdress is necessarily a maid. For the maid tag to be used, other parts of a maid's uniform should be present as well.
The following tags are aliased to this tag: maid_cachusha and maid_headband (learn more).