As the T Shirt is a popular seller we've added the design to some other gifts in the store. You'll now find the Pi Day and St Patrick's Day Pi equation on hats, tote bags, badges, stickers and even US Postage Stamps as well as the original T Shirt.
St Patricks Day & Pi Day Combination Hat by DigitalDreambuilder
More St Patricks Day, Shamrocks and Ireland Gifts
St Patricks Day & Pi Day Combination Tote Bag by DigitalDreambuilder
More St Patricks Day, Shamrocks and Ireland Gifts
St Patricks Day & Pi Day Button Badge Name Tag by DigitalDreambuilder
More St Patricks Day, Shamrocks and Ireland Gifts
St Patricks Day & Pi Day Sticker Label Name Tags by DigitalDreambuilder
More St Patricks Day, Shamrocks and Ireland Gifts
St Patricks Day & Pi Day Combination Postage Stamp by DigitalDreambuilder
More St Patricks Day, Shamrocks and Ireland Gifts
And the original T shirt, recently sold on zazzle :