Funny Birthday Cards Pop Culture Birthday Greeting Cards The perfect Birthday Greeting Card for Pop Culture fans who love Andy and Watch What Happens Live. Phrase: In Girl Math, You are 21 - A2 Folded Card [Size: 4 1/4 x 5 1/2"] - A2 Hot Pink Envelope [Size: 4 3/8 x 5 3/4 in.] - Interior Card: Blank - Cello Clear Cover for Card Protection