From DoA ABJD Wiki
In BJD culture, 'accessories' can refer to an item used to complement a fashion or style available to your doll that do not fall under categories such as clothing, eyes, and wigs. Items such as jewelry, hair clips/bows, purses, some props etc. are considered BJD accessories. Not all props are considered accessories, necessarily. If it's not something that can go on the doll or the outfit, itself, to compliment or add to its style, looks or fashion, it's purely a prop, not an accessory.