The image features a graphic design with a white background. At the center, there is a black tennis ball with a white outline, and to its left, there is a green heart with a white outline. Above the tennis ball, the phrase "Little Sister Biggest Fan" is written in a cursive font with the words "Little Sister" in black and "Biggest Fan" in green. Below the tennis ball, the word "FAN" is written in a large, bold, black font. The overall design suggests a theme related to tennis and sisterhood.