therapist’s choice jackson roll zip on pillowcase (pillow case only, does not include the pillow) (white polyester) therapist’s choice jackson roll zip on pillowcase (pillow case only, does not include the pillow). available in a white polyester cover or in a deluxe super soft yellow velour cover. fits jackson rolls up to 17" x 7", it's designed to fit our therapist's choice jackson roll 16.9"x7.1", but it should fit any jackson roll with similar dimensions.