This dice tower is custom-made to fit over the lip of the PBS dice trays.  It measures (9 1/4" high, 4 1/2" wide and 3 1/2" deep, with the opening measuring 4 1/2" by 5 1/2" at the opening.  Inside of the tower are two flaps that help shuffle and disrupt the dice as they roll out of the tower.  These towers are made by Victor Wenzel, and his other work can be found at: https://www.facebook.com/profile.php?id=61577398885463     (Tray sold separately).