Funny 13th Birthday Shirt - Square Root of 169 Years Old Tee

Black Funny 13th Birthday Shirt - Square Root of 169 Years Old Tee main image
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Celebrate a 13th birthday with a touch of humor in this black novelty t-shirt. The shirt features a white graphic design of the square root of 169, playfully hinting at the birthday age. Made from what appears to be a comfortable, soft-feel fabric, this tee is perfect for casual wear, birthday parties, or as a fun gift for the birthday boy or girl. This unique design adds a mathematical twist to the traditional birthday celebration. Get ready for the big day with this standout tee!

Tags:

#birthday shirt #13th birthday #square root #math tee #novelty shirt #gift idea #funny shirt #black t-shirt #casual wear #men's shirt #women's shirt
$35.99 $9.99

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Available Styles:

Variant 1 of Funny 13th Birthday Shirt - Square Root of 169 Years Old Tee
Variant 2 of Totally Hard Avocado Graphic Tee
Variant 3 of Dad Bod Bear T-Shirt - Funny Graphic Tee
Variant 4 of Bark Ranger Dog T-Shirt - Golden Retriever Park Ranger Tee
Variant 5 of My Piano is Calling T-Shirt Musician Player Tee
Variant 6 of Bored to Death Cat T-Shirt - Funny Graphic Tee
Variant 7 of Bingo Voice T-Shirt - Funny Graphic Tee
Variant 8 of Punk Professional Uncle No Kids T-Shirt
Variant 9 of Exhausted Pigeon Graphic Tee | Funny Slogan Shirt
Variant 10 of Funny Reading T-Shirt - A Day Without Reading
Variant 11 of Awesome Cook T-Shirt - Funny Culinary Gift
Variant 12 of Funny Cat T-Shirt - I'm Sorry, Bed Plans
Variant 13 of Pizza Slice of Heaven T-Shirt Funny Foodie Tee
Variant 14 of Me + Bed = Best Couple Ever Graphic Tee
Variant 15 of Ramen Lover T-Shirt - Less People, More Ramen Graphic Tee
Variant 16 of Exercise? Extra Fries! Funny Graphic T-Shirt
Variant 17 of Vert Der Ferk? Men's Black Graphic T-Shirt
Variant 18 of Tired Postal Worker Funny T-Shirt
Variant 19 of Extreme Time Off Funny Graphic T-Shirt
Variant 20 of You Can Go Home Now Graphic Tee
Variant 21 of Cat Burrowing T-Shirt - Funny Cartoon Graphic Tee
Variant 22 of Drop It Like A Sloth Funny Graphic T-Shirt
Variant 23 of Funny "An Apple A Day" Graphic Tee - Black Cotton T-Shirt
Variant 24 of Guess the Words Funny Novelty T-Shirt
Variant 25 of Funny "I Donut Understand" Graphic T-Shirt
Variant 26 of Pregnancy Announcement T-Shirt: 'The One Where I'm Pregnant'
Variant 27 of Crawfish Boil Graphic Tee - Makes Me Feel Less Murdery T-Shirt
Variant 28 of Funny Dad Joke T-Shirt - People Who Laugh
Variant 29 of Dinosnore Cat T-Shirt - Funny Sleeping Dinosaur Tee
Variant 30 of Gastroenterologist Humor T-Shirt - You Would Drink Too

FAQ

Size Guide

Our tees fit true-to-size. Check the size chart before ordering to ensure a perfect fit.

Shipping Time

Processing 2–3 business days; standard delivery 5–12 business days depending on destination.

Care Instructions

Machine wash cold with like colors. Do not bleach. Tumble dry low. Iron inside-out if needed.