As a sportscard collector I decided to take the idea of a 'team of drawings' to the realm of actual trading cards. I found a company that made baseball cards and decided to have a couple of my drawing made in to cards. They are the same size as baseball cards and even have the glossy finish.
Since making these cards I have found out that there are events where artists show and trade ATC's (art trading cards) but these are usually just little artworks that are on the 3.5x2.5 in format. Mine are different in that I have the photos of my artwork printed directly onto a baseball card.