PI DAY 2026
PI DAY T-SHIRT PRE-ORDERS
We are infinitely geeked to offer these limited edition Pi Day t-shirts! Designed by Maggie Laughner and printed by Ocelot Print Shop (on a cozy 100% U.S. Cotton Comfort Colors Tee!), these cute pocket tees are what all of the pie and math lovers will be wearing this season.
PLACING YOUR ORDER
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Please note that this is a pre-order sale. T-shirts will begin printing the week of March 9.
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Shirts are available adult sizes S, M, L, XL, 2XL, and 3XL. To learn more about Comfort Colors' size measurements, click here.
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To place an order, click the tile above to review prices and sizing.
PICK-UP
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Orders placed by 9:00am EST Thursday 3/5 will be available for pick-up on Friday 3/13 between 7:30am - 12:00pm.
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Orders placed after 9:00am EST Thursday 3/5 will be notified via email when the order is ready for pick-up.
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Pick-ups will happen at Sister Pie (8066 Kercheval Ave, Detroit).
SHIPPING
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USPS Flat-Rate Shipping is available to all contiguous U.S. address.
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While shipping is available, as this is a pre-order sale, we cannot guarantee shirts will ship in time to arrive for Pi Day.
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Once your order is packed and a shipping label is made, you will automatically receive an email with a tracking number.
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We offer USPS Flat-Rate Shipping (3-5 business days). The 3-5 business day shipping estimate is how long it will take for the item to arrive to you once your order gets put in the mail, not how long it will take to get from the time you ordered. We will always try our best to mail orders as quickly as possible.
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Live outside the contiguous U.S. (Alaska, Hawai'i, Canada, Mexico, and so on) and want to have a shirt shipped to you? Send an email to hello@sisterpie.com to place an order.
PI DAY PIE PRE-ORDERS
More information coming soon!






