The plate is rendered from sand-cast aluminum and polished to a glowing finish. The measurements of the plate are 6 inches in diameter. Sold individually, the plate may be paired with any of the Mariposa spreaders to created a gorgeous set.. 6″ in diameter. About Mariposa: Elegant and durable, Mariposa Brillante is handmade in Massachusetts using 100 percent recycled aluminum. Felt storage bag and care card are included.