Celebrate a special 15th birthday with this unique and humorous t-shirt! The shirt features the square root of 225 with the words "years old" underneath. The design is printed in crisp white on a classic black, soft-touch fabric. This makes for a great gift and conversation starter at any birthday party. This fun tee is perfect for any 15-year-old with a sense of humor and a love for math. It is versatile enough to be dressed up or down, and makes a statement wherever it's worn. Get ready to turn heads and make memories with this eye-catching t-shirt!