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$Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt$

$Black Sweatshirt Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt$

$Black Hoodie Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt$

Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt

Name: Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt - DigitalHandmades
Brand: Digital Handmades
SKU: 06c5efc8d8f5
Price: 14.99 USD
Availability: InStock

Original price was: $22.99.Current price is: $14.99.

Fit Style*

Men

Women

Youth

Mug

📐Size Guide

Unisex V-Neck Product Details

Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt

Discover the perfect blend of style and comfort with our custom V-neck t-shirts. Made from a lightweight 4.2 oz/yd² (142 g/m²) fabric, these t-shirts are ideal for any season. The 100% cotton material ensures a soft, comfortable feel that you’ll love wearing.
Designed with a retail fit and a fashionable V-neckline, these t-shirts offer a sleek silhouette that works effortlessly in both casual and semi-formal settings.
We’re committed to ethical production, with Bella+Canvas being a Fair Labor Association member and holding Platinum WRAP certification. This guarantees that every t-shirt is made under humane, sustainable conditions with a strict no-sweatshop policy.
Each Bella+Canvas 3005 t-shirt features a convenient tear-away label. Choose from Heather colors (52% cotton, 48% polyester) or Athletic Heather (90% cotton, 10% polyester) for a touch of versatility and quality in every wear.

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	16.5 in	27 in
S	18 in	28 in
M	20 in	29 in
L	22 in	30 in
XL	24 in	31 in
2XL	26 in	32 in
3XL	28 in	33 in
4XL	30 in	34 in
5XL	32 in	35 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	42 cm	69 cm
S	46 cm	71 cm
M	51 cm	74 cm
L	56 cm	76 cm
XL	61 cm	79 cm
2XL	66 cm	81 cm
3XL	71 cm	84 cm
4XL	76 cm	86 cm
5XL	81 cm	89 cm

📐Size Guide

Unisex Hoodie Product Details

Wrap yourself in ultimate comfort with our Unisex Hoodie, crafted from a medium-heavy fabric blend of 50% cotton and 50% polyester. With a substantial weight of 8.0 oz/yd² (271 g/m²), this hoodie delivers the perfect balance of cozy warmth and durability, making it your go-to choice for chilly days and laid-back lounging.
Featuring a classic fit, this hoodie ensures a relaxed yet stylish silhouette. The practical pouch pocket is perfect for keeping your hands warm or storing essentials, while the tear-away label guarantees a scratch-free experience. The color-matched drawcord and double-lined hood not only add a touch of modern flair but also enhance the garment's longevity.
We take pride in our commitment to ethical and sustainable production. This hoodie is made with 100% ethically grown US cotton and benefits from the US Cotton Trust Protocol, ensuring responsible practices from farm to fabric. Additionally, our dyes are OEKO-TEX-certified, reflecting our dedication to minimizing environmental impact.
For a touch of variety, please note that Heather Sport colors are crafted from a 60% polyester and 40% cotton blend, offering a slightly different texture while maintaining the same high-quality feel.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
S	20 in	27 in
M	22 in	28 in
L	24 in	29 in
XL	26 in	30 in
2XL	28 in	31 in
3XL	30 in	32 in
4XL	32 in	33 in
5XL	34 in	34 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
S	51 cm	69 cm
M	56 cm	71 cm
L	61 cm	74 cm
XL	66 cm	76 cm
2XL	71 cm	79 cm
3XL	76 cm	81 cm
4XL	81 cm	84 cm
5XL	86 cm	86 cm

📐Size Guide

Womens T-Shirt Product Details

Elevate your wardrobe with the Comfort Colors 1717 Women’s T-Shirt, crafted from medium-weight fabric (6.1 oz/yd² or 206.8 g/m²) and made from 100% ring-spun US cotton. This premium cotton ensures long-lasting comfort and a soft touch that feels great all day.
Designed with a relaxed fit, this tee is versatile enough for both casual outings and semi-formal occasions. The classic crew neckline adds a timeless, neat style, perfect for layering or accessorizing.
Our pre-shrunk fabric guarantees a consistent fit wash after wash. For the perfect size, refer to our Comfort Colors 1717 size chart. Each shirt features a signature sewn-in twill label, ensuring quality and durability.
Committed to ethical and sustainable practices, our tees are made from 100% ethically grown US cotton, and Gildan proudly supports the US Cotton Trust Protocol. Enjoy a tee that combines superior comfort, timeless style, and responsible production.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	16.5 in	27 in
S	18 in	28 in
M	20 in	29 in
L	22 in	30 in
XL	24 in	31 in
2XL	26 in	32 in
3XL	28 in	33 in
4XL	30 in	34 in
5XL	32 in	35 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
S	46 cm	68 cm
M	51 cm	71 cm
L	56 cm	75 cm
XL	61 cm	78 cm
2XL	66 cm	80 cm
3XL	70 cm	83 cm
4XL	76 cm	85 cm

📐Size Guide

Premium Womens T-Shirt Product Details

Made from 100% Airlume combed and ring-spun cotton, this tee features a lightweight fabric at 4.2 oz/yd² (142 g/m²), making it effortlessly breathable and perfect for layering. Whether you're on the go or enjoying leisure time, this tee delivers unparalleled comfort.
The retail fit is tailored for a flattering, contemporary look that's suitable for casual outings and semi-formal occasions alike. The classic crew neckline adds a neat, timeless touch, making it easy to accessorize and adapt to any outfit.
Manufactured by Bella+Canvas, a leader in ethical production, this tee is crafted both in the US and internationally under humane, no-sweat-shop conditions. Bella+Canvas is a proud member of the Fair Labor Association and is Platinum WRAP certified, ensuring sustainable and fair labor practices.
The tear-away label is designed to prevent skin irritation, enhancing your comfort. Available in various fabric blends—Ash and Heather Prism colors (99% cotton, 1% polyester), Heather and Solid Blend colors (52% cotton, 48% polyester), and Athletic Heather and Black Heather (90% cotton, 10% polyester)—this tee combines exceptional quality with versatile style.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	16.5 in	27 in
S	18 in	28 in
M	20 in	29 in
L	22 in	30 in
XL	24 in	31 in
2XL	26 in	32 in
3XL	28 in	33 in
4XL	30 in	34 in
5XL	32 in	35 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	42 cm	69 cm
S	46 cm	71 cm
M	51 cm	74 cm
L	56 cm	76 cm
XL	61 cm	79 cm
2XL	66 cm	81 cm
3XL	71 cm	84 cm
4XL	76 cm	86 cm
5XL	81 cm	89 cm

📐Size Guide

Women Hoodie T-Shirt Product Details

Stay warm and stylish with our Women’s Hoodie, crafted from a medium-heavy fabric blend of 50% cotton and 50% polyester, weighing 8.0 oz/yd² (271 g/m²). This combination offers the perfect balance of cozy softness and essential warmth, making it your go-to choice for chilly days.
Designed with a classic fit, this hoodie features a practical pouch pocket for added convenience and a tear-away label to ensure a scratch-free, comfortable wearing experience. The color-matched drawcord and double-lined hood not only enhance durability but also add a touch of sophisticated flair to your look.
Proudly made from 100% ethically grown US cotton, our hoodie reflects our commitment to sustainable and responsible production. Gildan is a proud member of the US Cotton Trust Protocol, ensuring our practices are both ethical and environmentally friendly. The dyes used are OEKO-TEX-certified, demonstrating our dedication to reducing environmental impact.
For Heather Sport colors, the fabric blend is 60% polyester and 40% cotton, offering a unique texture while maintaining high-quality comfort.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
S	20 in	27 in
M	22 in	28 in
L	24 in	29 in
XL	26 in	30 in
2XL	28 in	31 in
3XL	30 in	32 in
4XL	32 in	33 in
5XL	34 in	34 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
S	51 cm	69 cm
M	56 cm	71 cm
L	61 cm	61 cm
XL	66 cm	66 cm
2XL	71 cm	79 cm
3XL	76 cm	81 cm
4XL	81 cm	84 cm
5XL	86 cm	86 cm

📐Size Guide

Women's V-Neck Product Details

Discover the perfect blend of comfort and style with our Women’s V-Neck T-Shirt. Made from a lightweight fabric (4.2 oz/yd² or 142 g/m²), this tee offers versatility across seasons, while the 100% cotton composition ensures a smooth and comfortable wearing experience.
The classic retail fit paired with a flattering V-neckline creates a chic, stylish silhouette suitable for any occasion—be it a casual outing or a semi-formal event.
Crafted with care, our t-shirts are manufactured by Bella+Canvas, a proud member of the Fair Labor Association and Platinum WRAP certified. This guarantees that each tee is produced under strict ethical standards and humane conditions, both in the US and internationally, with a firm no-sweatshop policy.
For added comfort, each shirt features a tear-away label, ensuring an irritation-free fit. The fabric blend for Heather colors is 52% cotton and 48% polyester, while Athletic Heather features a mix of 90% cotton and 10% polyester.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	17 in	27 in
S	18 in	28 in
M	20 in	29 in
L	22 in	30 in
XL	24 in	31 in
2XL	26 in	32 in
3XL	28 in	33 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	42 cm	68 cm
S	46 cm	70 cm
M	51 cm	73 cm
L	56 cm	76 cm
XL	61 cm	78 cm
2XL	66 cm	81 cm
3XL	71 cm	83 cm

📐Size Guide

Youth Tee T-Shirt Product Details

Give your young ones the comfort and style they deserve with our Youth Tee! Crafted from 100% midweight US cotton, this tee offers a soft, plush feel that’s perfect for any season, with a substantial 5.3 oz/yd² (180 g/m²) fabric that holds up to daily wear.
Featuring a classic crew neckline and a timeless fit, this tee is designed to be a wardrobe staple for everyday adventures. The pearlized, tear-away labels ensure a scratch-free experience, making it as comfortable as it is stylish.
We take pride in our commitment to ethical production: this tee is made from ethically grown and harvested US cotton. As a member of the US Cotton Trust Protocol, Gildan ensures sustainable and responsible manufacturing practices. Plus, it is certified by Oeko-Tex, so you can trust its safety and quality.
For different color options, our heather colors blend 50% cotton with 50% polyester, Sport Grey features 90% cotton and 10% polyester, and Ash is composed of 99% cotton and 1% polyester.

Size Chart

Inches
Centimeters

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	16.14 in	20.47 in
S	16.93 in	22.05 in
M	18.11 in	23.62 in
L	18.90 in	25.20 in
XL	20.08 in	26.38 in

Length is measured from the highest point on the collar down to the bottom hem.
Width is measured across the body of the shirt under the armpits, one way.
Sleeves are measured from center back to hem.

SIZE	WIDTH	LENGTH
XS	41 cm	52 cm
S	52 cm	56 cm
M	46 cm	60 cm
L	48 cm	64 cm
XL	51 cm	67 cm

Print on the*

Front (default)

Back

Both side ($5.95)

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Payment Guide:
1. Pay with Paypal Account to complete the payment.
2. Or you can Pay with Debit/Credit Card without Paypal Account.

PRODUCTS INFORMATION

Available Style: Unisex T-shirt - Premium Fit Men T-shirt - Premium Fit Women T-shirt - Long Sleeve Tee - Hooded Sweatshirt - Ladies Flowy Tank - Sleeveless Tee - Unisex Tank - V-Neck T-Shirt - Youth T-Shirt.
Please view size guide before order.
Products are proudly printed in the United State.

RETURN & WARRANTY

100% Secure payment with SSL Encryption.
If you're not 100% satisfied, let us know and we'll make it right.

SHIPPING POLICY

Orders ship within 3 to 5 business days.
Rush 3-day service is available on select products.
Tip: Buying 2 products or more at the same time will save you quite a lot on shipping fees.

SKU: 06c5efc8d8f5 Categories: Shirt, Top Trending Tags: Be Irrational, Funny Math, Funny Pi Day, Happy Pi Day, Math Lover, Math Teacher Gift, Pi Day Apparel, Pi Day Shirt, Science Shirt, teacher gift

Celebrate Pi Day with this unique and stylish shirt! Show your love for mathematics and embrace your irrational side with our “Happy Pi Day: Be Irrational” tee. Featuring a clever design appealing to both math enthusiasts and teachers, this shirt is perfect for classroom celebrations, Pi Day parties, or everyday wear. Made from high-quality, comfortable material, this shirt offers a perfect blend of style and comfort. The bold design is eye-catching and memorable, sparking conversations and demonstrating your passion for the fascinating world of mathematics. Whether you’re a student, teacher, or simply a math lover, this shirt is a must-have for your wardrobe. It’s a great gift idea for fellow math enthusiasts, colleagues, or students. Stand out from the crowd with this unique Pi Day apparel. Shop now and add a touch of mathematical flair to your style! Our shirts are available in a variety of sizes, ensuring a perfect fit for everyone. Don’t miss out on this limited-edition design – order yours today and celebrate Pi Day in style! #piday #mathlover #teachers #irrational #tshirt #math #pi #giftideas #limitededition #mathematics #teachergifts

Shipping Policy & Manufacturing Info

Our shirts are made when ordered. Due to the time variability of on-demand manufacturing, we offer 2 options for how quickly you want to receive your order. You can select from the following choices in checkout.

Standard Shipping ($4.99+)

Orders using this option generally arrive 5-10 days (U.S. orders) and it takes 2 weeks for International orders after being manufactured and shipped. (See notes below)
Manufacturing times for this option vary more around busier times of the year or during extreme circumstances such as covid-19 shutdowns.

Shipping and expedited manufacturing ($19.99+) (U.S. Only)

Orders using this option jump to the front of the manufacturing queue which can generally save a couple days (or more during busier times of the year).
It's highly recommended to use this option if you are ordering for a specific event or holiday.
Orders using this option generally arrive 2-3 days after being manufactured and shipped. (U.S. only)
Orders using expedited manufacturing will be printed when the next batch of orders are processed which can vary depending on seasonality and other factors.

Please Note:

We do not guarantee shipping or arrival dates.
Manufacturing during the majority of the year takes between 1-5 business days (Mon-Fri) however can take more than a week during the heaviest shopping times of the year. Extreme circumstances such as covid-19 may delay order manufacturing and/or shipping by an additional week or more.
All manufacturing and shipping times mentioned are just estimates and will vary.
Some of our popular designs may be pre-printed and may ship out faster than less commonly ordered designs/style/color combinations.

Always the cutest files! I love this shop.

Warning I'm An Asshole So If You Don't Want Your Feelings Shirt

I order the lavender colored hat. Good quality. Stitch is nicely

Great quality, exactly what I hoped for. Quick delivery. Gift so not worn or washed yet.

Ordered this as a Birthday present and it looks and feels great 👍

All was well on the product.

Arrived on time - thank you

Fast delivery on first inspection quality looks good. See how it holds up For a xmas pressie - sad I know but ..... hate xmas shopping I like to get it Iver and done with.

It looks exactly like it is pictured!

Love these designs and the colors are fantastic!

Exactly as described fast delivery

Love the designs, the details are great, and the coloring is wonderful!

Matched the description; quality is good; color could have been more intense though on the tshirt; other than that all good

It's a really cool t-shirt!

Excellent quality prints, great price

Absolutely love these pics, perfect. Highly recommended.

this is so me! i love it! i love all things sarcastic! perfect for what i needed

Wonderful gift and arrived quickly and my partner loves it

This is a great I made and a T-shirt

Good product delivered on time

Great and apt gift . Luvd it.

Delivery, and apron All good thank you.

Great t shirt. Original order arrived with slight fault but replacement sent out without any issue and quickly. Excellent customer service and great product.

Delivered on time gd quality thanks craig

My husband really liked it

Brilliant shirt. It fit and arrived on time!

Very please with item. The shirt came before expected delivery date. My husband loved it. Exactly as described. Would definitely recommend. Very satisfied

SIZE	WIDTH	LENGTH
XS	13.98 in	26.97 in
S	15 in	27.48 in
M	15.98 in	27.95 in
L	16.97 in	28.46 in
XL	17.99 in	28.98 in
2XL	18.98 in	29.49 in

SIZE	WIDTH	LENGTH
XS	35.50 cm	68.50 cm
S	28.10 cm	69.80 cm
M	40.60 cm	71 cm
L	43.10 cm	72.30 cm
XL	45.70 cm	73.60 cm
2XL	48.20 cm	74.90 cm

SIZE	WIDTH	LENGTH
XS	43.18 cm	47.63 cm
S	45.72 cm	50.16 cm
M	48.62 cm	50.80 cm
L	50.80 cm	52.39 cm
XL	54.61 cm	53.98 cm
2XL	58.42 cm	55.56 cm

SIZE	WIDTH	LENGTH
2T	15.62 in	14.50 in
4T	16.62 in	15.50 in
5-6T	17.62 in	16.50 in

SIZE	WIDTH	LENGTH
2T	39.68 cm	36.83 cm
4T	42.22 cm	39.37 cm
5-6T	44.76 cm	41.91 cm

SIZE	WIDTH	LENGTH
XS	17 in	18.75 in
S	18 in	19.75 in
M	19 in	20 in
L	20 in	20.62 in
XL	21.50 in	21.25 in
2XL	23 in	21.87 in

SIZE	WIDTH	LENGTH
XS	16 in	19.75 in
S	17 in	21.25 in
M	18 in	22.50 in
L	19 in	24 in
XL	20 in	25.50 in

SIZE	WIDTH	LENGTH
6M	12.50 in	9.75 in
12M	13 in	10.25 in
18M	13.50 in	10.75 in
24M	14 in	11 in

SIZE	WIDTH	LENGTH
6M	31.75 cm	24.77 cm
12M	33.02 cm	26.04 cm
18M	34.29 cm	27.30 cm
24M	35.56 cm	27.94 cm

Happy Pi Day Be Irrational Funny Math Lover Teachers Pi Day Shirt

Unisex T-Shirt Product Details

Size Chart

Premium Unisex T-Shirt Product Details

Size Chart

Unisex V-Neck Product Details

Size Chart

Unisex Long Sleeve Product Details

Size Chart

Unisex Hoodie Product Details

Size Chart

Unisex Sweatshirt Product Details

Size Chart

Unisex Tank Top Product Details

Size Chart

Womens T-Shirt Product Details

Size Chart

Premium Womens T-Shirt Product Details

Size Chart

Women Hoodie T-Shirt Product Details

Size Chart

Racerback Tank Top Product Details

Size Chart

Women's V-Neck Product Details

Size Chart

Women's Crop Top Product Details

Size Chart

Youth Tee T-Shirt Product Details

Size Chart

Youth Hoodie Product Details

Size Chart

Youth Sweatshirt Product Details

Size Chart

Toddler T-Shirt Product Details

Size Chart

Baby Onesie Product Details

Size Chart

PRODUCTS INFORMATION

RETURN & WARRANTY

SHIPPING POLICY

Related products

Shipping Policy & Manufacturing Info

Standard Shipping ($4.99+)

Shipping and expedited manufacturing ($19.99+) (U.S. Only)

Please Note:

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