Pink flamingo card. Pink Flamingo Greeting Card - Birthday. This pink flamingo greeting card features 2 pink flamingo ladies enjoying cocktails. On the outside it reads, "I sure hope it's your birthday...". Inside it reads, "...'cause I'm drinking to it! Happy Birthday". The card measures 5" x 5" and comes with a special decorated envelope that brings the mailing size to 5" x 7". Printed in the USA on recycled paper.