See all your cards at a glance.The angled grooves in the Three-Slotted Card Holder provide a clear view of all your cards. Solid wood block measures 7" x 4" (18 x 10cm) wide. The handy, Four-Slotted holder has four slots and allows good visibility of all cards. The Four-Slotted holder measures 9-1/2" x 5" (23 x 13 cm) wide.