PAIR Vintage Steuben Leaping Dolphins Madigan # 7880 Excellent Condition Vintage Steuben Leaping Dolphin Madigan # 7880. This was designed by George Thompson. It measures 6 inches high by 5+ inches deep the width across the gils is 3 inches. Weighs 2.8 pounds. It is inscribed on the underside Steuben.