Funny 11th Birthday Shirt - Root 121 Years Old Black Tee

Black Funny 11th Birthday Shirt - Root 121 Years Old Black Tee main image
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Celebrate turning eleven with this fun and quirky black t-shirt! This novelty tee features a playful mathematical design: the square root of 121, cleverly stating "Years Old." Made from a soft, comfortable fabric, this shirt is perfect for a casual birthday celebration, school event, or just everyday wear. It's a great conversation starter and a unique way to show off your age with a bit of math humor. Ideal for kids, teens, or adults who love math jokes and birthday apparel. This tee offers a relaxed fit and is sure to be a hit at any birthday party. Get yours today and celebrate in style!

Tags:

#birthday shirt #eleven #11th birthday #math joke #square root #novelty tee #black t-shirt #birthday gift #funny shirt
$35.99 $9.99

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Variant 1 of Funny 11th Birthday Shirt - Root 121 Years Old Black Tee
Variant 2 of Sumo Cat T-Shirt - Unique Design!
Variant 3 of Hang On Overthink This T-Shirt
Variant 4 of Is This Your Homework Larry? T-Shirt
Variant 5 of World's Best Farter - Funny Men's T-Shirt
Variant 6 of I'm A Drop the F-Bomb Kind of Mom Graphic Tee
Variant 7 of Laziness Funny Graphic T-Shirt
Variant 8 of Pig Reading Newspaper on Toilet T-Shirt
Variant 9 of Production Manager Graphic Tee - Funny Job T-Shirt
Variant 10 of Back Off! Crazy Daughter T-Shirt
Variant 11 of Funny Cat T-Shirt - I Don't Like Morning People
Variant 12 of Funny Walking People T-Shirt
Variant 13 of Humorous Graphic Tee - I'm Not the Bigger Person
Variant 14 of I Don't Always Make Candles T-Shirt
Variant 15 of Dodge Duck Dip Dive Dodge T-Shirt
Variant 16 of Attitude Graphic Tee - Funny Sarcastic T-Shirt
Variant 17 of Living That Spare Parts Life T-Shirt
Variant 18 of Funny Graphic Tee - "I Bring Not Peace But The Sword"
Variant 19 of Hang On Let Me Overthink This T-Shirt
Variant 20 of Done Emotion T-Shirt
Variant 21 of Nurses Work Harder Graphic Tee
Variant 22 of It Hurt Tee - Funny Sarcastic T-Shirt
Variant 23 of I've Lost My Leg T-Shirt - Funny Amputee Humor Tee
Variant 24 of I Bought This Shirt With Your Money Black Tee
Variant 25 of Flamingo Camper T-Shirt: You Don't Have to Be Crazy!
Variant 26 of Good Friday T-Shirt, Black Cotton Blend
Variant 27 of Krazy Team I Know She's Crazy Black T-Shirt
Variant 28 of Funny Graphic Tee - "It's Not Me, It's The Shirt"
Variant 29 of Exercise? Extra Fries! Funny Graphic Tee
Variant 30 of Funny Penguin Graphic T-Shirt

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.