Halloweeen Plastic Asylum Hospital Backdrop Banner Halloweeen Plastic Asylum Hospital Backdrop Banner 3 pcs. Per Set Scary party decorations like this asylum backdrop instantly fill your room with fear and fun. Set out some zombie photo booth props in front of this party background and watch how fast your Halloween party guests start snapping and posting pictures of your Halloween party! Plastic. (3 pcs. per set) Assembled, 9 ft. x 6 ft. Simple assembly required.