This retro design reads "The World's Greatest Sister." SISTER is spelled using colorful shapes for the background of each white letter, giving the design an old-fashioned feel. This makes a great gift idea for sisters! The white letters take on a different effect on dark versus light backgrounds. Change the style or color to make this your own! Add text to the front or back. This makes a great gift idea for your sister on her birthday, graduation or any other special day.