Measures 40mm or approx. 1-3/4 inches across and 1-3/4 inches in length and is 3/4 of an inch in thickness. These Egyptian 30% leaded crystal hearts are of good quality and very close to the famous maker's hearts but at less than half the price. You can see the rainbows in the pictures, hang them in a sunny window and they produce as many rainbows as those by any other maker. They have a hole at the top perfect for hanging in your window. Your prisms will be boxed with a bow as shown (when shipped by Priority Mail).