Make 3.14 great again. Beware the Pis of March Tshirt from RedBubble.
Happy Pi Day to you and your cat! A clever nerdy gift for literature and mathematics lovers. The distressed black text on the tee and sticker design state: BEWARE THE PIs OF MARCH.
The graphic is a Roman spatha short sword with the number PI written below it as 3.1415926535897932384626433832.