ADVANTUS-Tim Holtz Idea-ology: Alpha Cards. Alpha Cards are a deck of mini cards displaying letters and numbers in a domino-style manner. On each card the letter or number is printed twice-- once 'right side up' and once 'upside down'. Each card measures 2-1/2x 1-3/8 inches and the set contains two of each letter (A-Z) and number (0-9). This package contains seventy-two cards. Imported.