This paper card of St. Dominic Savio measures 2 1/4 x 4".  The prayer on the back starts, "O Saint Dominic Savio, model of purity, piety, penance and apostolic zeal for youth; grant that, through your intercession, we may serve God in our ordinary duties with fervent devotion, and attain the grace of holy joy on earth, that we may one day love God forever in Heaven. Amen."