Artisan Sterling Silver Roaring Hippopotamus Miniature Wonderful artisan 925 sterling silver roaring hippopotamus miniature. Highly sought after by collectors this beautiful hippopotamus is highly detailed with great attention to the smallest details with its mouth wide opened. This item was made in the electroforming method. Measurements: Height: 2.7in. / 6.858cm. Width: 3.4in. / 8.636cm. Weight: 66.5gr. / 2.138oz. Marks: 925 for sterling silver.