Frankie Paige, played by Patricia Arquette, wore this red head kerchief during the scene after she and Father Kiernan (Gabriel Byrne) had an arguement, then she went to the outside flower shop, where he followed her and they convserved for a while. Then she received the wounds of Christ in the feet. It's a red cotton 20" X 20" head kerchief. (The production tag came with it.)
This is a capture of the scene in which Frankie Paige (Patricia Arquette) with Father Kiernan (Gabriel Byrne) is seen wearing the red head kerchief.