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 Good Mom Hood Playlist Graphic Tee
Variant 3 of Sorry I'm Not Listening Graphic Tee
Variant 4 of Sleep All Day Nurse All Night T-Shirt
Variant 5 of Rainbow Unicorn Dab T-Shirt - Personalized!
Variant 6 of Music is My Girlfriend Graphic Tee
Variant 7 of Punk Professional Uncle No Kids T-Shirt
Variant 8 of Kiss The Goat T-Shirt - Black Graphic Tee
Variant 9 of I Like Potatoes T-Shirt - Funny Foodie Tee
Variant 10 of Old Man with Drums T-Shirt: Never Underestimate
Variant 11 of Kebab Ninja Black Graphic T-Shirt, Unique Design
Variant 12 of Cartoon Graphic Print T-Shirt
Variant 13 of I'm Not Idle Standby Mode Graphic Tee
Variant 14 of Wenches Diggeth Me T-Shirt - Humorous Graphic Tee
Variant 15 of Funny "An Apple A Day" Graphic Tee - Black Cotton T-Shirt
Variant 16 of Funny Sarcastic Graphic Tee: Time & Crayons
Variant 17 of Get Weird Graphic Tee - Unisex Cotton T-Shirt
Variant 18 of Anti-Stupid Graphic Tee - Sarcastic Humor T-Shirt
Variant 19 of Funny Husband Graphic Tee: I Never Dreamed
Variant 20 of SHHH... No One Cares Graphic T-Shirt
Variant 21 of Anime Eyes Graphic Black Tee Shirt
Variant 22 of Funny "You Look Mean" Sarcastic T-Shirt
Variant 23 of Donut Six Pack T-Shirt - Funny Gym Tee
Variant 24 of Eat Sleep Gorillas Repeat Black Graphic Tee
Variant 25 of Hoop Hoop Hooray Cat T-Shirt
Variant 26 of Funny Slogan Tee - If People Are Talking Behind Your Back Just Fart
Variant 27 of BFF Crazy! Novelty Graphic T-Shirt
Variant 28 of Banana Shark Graphic T-Shirt
Variant 29 of Funny 'Amazingness' Graphic Tee - Black
Variant 30 of Funny Women's T-Shirt - Who Says We Want To Be Younger?

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.