BallQube Grandstand Baseball Holder Acrylic Display - Made in the USA MADE IN USA. BallQube designed and patented this case to match MLB regulation size baseball. Official Major League Baseball is required to have 9" to 9.25" circumference. Lock It on the Sweet Spot with a BallQube! Securely fits up to a 9.25" circumference baseball. Laboratory tested to block 98% of UV light. Stack them up! Stylized baseball diamond corners provide a stacking mechanism. Archival safe Baseball display case Crystal clear