Now retired prisms measuring: 50mm is 2-1/8 inches long by 1-5/8 inches wide, the 38mm is 1-3/8 inches long by 1 inch wide both have a slight rounding both front and back. Dramatic Suncatchers covered with a series of rectangle geometric cuts on both front and back. These prisms are awesome rainbow makers! At a half inch in thickness the light reflections seem to go on forever creating bright bold rainbows. Hang it in your sunny windows and watch the colors dance. These are high quality unique pieces that are almost never seen in stores. It has the Swarovski logo next to the hole at the top for hanging. Your prisms will be gift boxed with a bow as shown. Beads and hanging filament included.