Funny 12th Birthday T-Shirt - Square Root of 144

Celebrate a 12th birthday with this unique and humorous t-shirt! The design features a bold square root symbol with the number 144, followed by the words "years old," making it a clever math joke for anyone turning twelve. Made from a soft, breathable black fabric, this tee offers comfort and style. The understated graphic makes it easy to match with any outfit. It's a standout piece for casual wear or special birthday occasions. Ideal as a birthday gift that's both fun and functional.