Jorge Ferrari-Hardoy designed Knoll Leather and Steel Butterfly Ottoman / Foot Stool, circa 1950. Featuring a sturdy Black Wrought Iron frame with new Black leather saddle cover. The Hardoy, butterfly chair and sling stool were designed by Argentinian architect Jorge Ferrari-Hardoy in 1937. For use with BKF Butterfly Chair if desired. Lowest seat measurement 13 inches. Total two pieces.