Pi Day Cards


March 14th (3/14) every year is Pi Day, celebrating the famed mathematical constant π, the ratio of a circle’s circumference to its diameter. Why not do something irrational and send Pi Day cards to your friends and relations!

Each card comes in a clear protective sleeve with an envelope. The interior is plain paper with the message “Happy π Day!”, ready for you to add your own personal touch.

Size 5x7 inches folded. Printed on 60 lb glossy white card stock.

Pi Day cards are sold individually. Please choose the desired quantity in your shopping cart. Select the artwork option you want on your cards—here’s a preview of your selection: