This black t-shirt features a humorous design perfect for a 12th birthday celebration. The graphic prominently displays the square root of 144, playfully stating "Years Old." Made from a comfortable-looking fabric, this tee is ideal for casual wear and birthday parties. It's a fun and unique way to celebrate turning twelve, appealing to those with a love for math or quirky humor. The classic crew neck and short sleeves ensure a relaxed fit, making it a great gift for the birthday boy or girl. Get ready to make a statement with this standout birthday shirt!
Select Size:
Select Color:
Available Styles:
Our tees fit true-to-size. Check the size chart before ordering to ensure a perfect fit.
Processing 2–3 business days; standard delivery 5–12 business days depending on destination.
Machine wash cold with like colors. Do not bleach. Tumble dry low. Iron inside-out if needed.