Each pipe cleaner measures approximately 6 inches long;ZEN the name you know & can trust for all your cleaning needs;Clean & repair old antique tube radios, T.V.'s, Ham Radios/Receivers;Such as Philco, RCA, Admiral, Zenith, Hallicrafters, Sears, Brewster, Crosley, Firestone, plus hundreds more!;Arts & crafts projects for many pre-school, kindergarten, elementary & JR. And high school teachers