Big eagle Brooch A superb artisan 925 sterling silver (NOT silver plated) American eagle brooch. Highly sought after by collectors this beautiful brooch is shaped as the symbol of the United states of America - The American Eagle. This item was made in the electroforming method. Measurements: Length: 36mm. / 1.41in. Width: 92mm. / 3.62in. Weight: 9.7gr. / 0.312oz. Marks: 925 for sterling silver.