"Clap, Clap, Clap" Vintage Retro style Birthday Card. The greeting inside says "Happy Birthday!" Each card is printed on heavy weight recycled linen cardstock and packaged in a clear cellophane sleeve with a recycled kraft paper envelope. These cards have the look of a letterpress card, but they are digitally printed in our Ann Arbor, MI studios. Each card is 4.25" x 5.5" Minimum 6 per style