A technical patent diagram for a baseball dominates the upper portion of this chalkboard-style illustration, rendered in white linework against deep charcoal gray. Below sit two detailed cross-section views showing the ball's internal layered construction, with measurements and annotations completing the scientific breakdown of this classic American sport's fundamental object. 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.