A bright yellow tennis ball floats at the center of a geometric composition divided by sharp diagonal bands of deep blue, cream, and sage green. White curved lines trace the ball's characteristic seams, while overlapping circular shadows in navy and olive suggest movement and dimension against the angular color-blocked background. Printed on smooth white card stock and made to order, artwork on the front, blank inside, envelopes included in every set. A handwritten note that arrives as an independent artist's work.