Card

A thick stiff piece of paper (card stock) in a uniform shape, typically rectangular, but other shapes exist as well. There are many different sizes of cards, a few are listed below.
 * Standard Poker Cards: 2.5x3.5in
 * Bridge Cards: 2.25x3.5in
 * Domino Cards: 1.75x3.5in
 * Half Poker Cards: 1.75x2.5in
 * Micro Cards: 1.25x1.75in
 * Square Cards: 2.5x2.5in
 * Circle Cards: 3.5x3.5in
 * Hex Cards: 3.75x3.75in