To use this headband, simply place it around your head. It's one - size, so it should fit most people comfortably. For a Halloween look, pair it with a spooky costume. As for maintenance, keep it away from sharp objects to avoid damaging the lace and rhinestones. You can gently dust it with a soft brush to keep it clean. Remember, because of hygiene reasons, this item can't be returned, so handle it with care.