Roughly 3 1/2" square. Color is not very strong but there is enough present to enhance and you will be the only person in the world with this image. Dated on reverse as 1972 they year of launching and this photo was taken by a woman who worked there from the 30's until the 70's. At first glance it appears she wrote 1922 but it is 1972, her 7 looks like a 2 but it is a 7.