


Pi in a Pie - Billy Edition T-Shirt
Overview
Meet our delightful "Pi in a Pie" t-shirt featuring Billy, the adorable mathematical Pi character! This playful design showcases our light green Pi symbol personified with expressive eyes, rosy cheeks, and a cheerful smile, all nestled inside a vibrant teal pie with blueberries and a decorative crust. The clever "PINAPIE" logo tops off this whimsical mathematical pun that perfectly blends geometry with dessert for a conversation-starting shirt that's as sweet as it is smart.
Design Features
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3D-Style Artwork - Features raised-edge black outlines giving the entire design a dimensional pop that stands out on the shirt's surface
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Vibrant Color Palette - Combines soothing light green, bold teal, and warm accent colors for a visually appealing design that catches the eye
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Cheerful Character - Billy the Pi symbol has an engaging personality with large expressive eyes, rosy cheeks, and a friendly smile that makes math approachable
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Clever Wordplay - The "PINAPIE" logo perfectly captures the mathematical pun in a stylish gradient font that ties the entire concept together
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Detailed Food Elements - Features a beautifully rendered pie with wavy crust border and scattered blueberries adding depth and authenticity to the design
Perfect For
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Math Teachers and Educators who want to spark interest in mathematical concepts with a fun, wearable conversation starter
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Math Enthusiasts and Students looking to show their passion for Pi and mathematical concepts in a playful, non-intimidating way
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Food Lovers with a Sense of Humor who appreciate clever puns that combine culinary themes with unexpected elements
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Gift Shoppers seeking the perfect present for science-minded friends with an appreciation for witty, visual wordplay
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Pi Day Celebrators wanting the ideal attire for March 14th festivities or other math-themed events and gatherings
More details
- Solid colors are 100% Airlume combed and ring-spun cotton
- Ash color is 99% combed and ring-spun cotton, 1% polyester
- Heather colors are 52% combed and ring-spun cotton, 48% polyester
- Athletic and Black Heather are 90% combed and ring-spun cotton, 10% polyester
- Heather Prism colors are 99% combed and ring-spun cotton, 1% polyester
EU GPSR Product Information:
- Manufacturer contact information
- Name: PiInAPie
- Email: contact@support.piinapie.store
- Postal address: PO Box 5696 Santa Monica, CA 90405
- Additional information: This product is made for adults. Meets the lead and phthalates level requirements. 2 year warranty in EEA and UK
Size & Fit
Quality Guarantee & Returns
- Quality is guaranteed. If there is a print error or visible quality issue, we'll replace or refund it.
- Because the products are made to order, we do not accept general returns or sizing-related returns.
Pi in a Pie - Billy Edition T-Shirt Size Guide

Size label | Length | Width |
---|---|---|
XS
|
27
|
16 1/2
|
S
|
28
|
18
|
M
|
29
|
20
|
L
|
30
|
22
|
XL
|
31
|
24
|
2XL
|
32
|
26
|
3XL
|
33
|
28
|
4XL
|
34
|
30
|
5XL
|
35
|
32
|