Funny 13th Birthday T-Shirt - Square Root 169

Celebrate turning 13 with this unique and humorous t-shirt! The design features a square root symbol over the number 169, followed by the text "Years Old". Made from what appears to be comfortable, breathable cotton or a cotton blend, this black tee is perfect for casual wear. The dark print ensures the design pops. Ideal for birthday parties, school events, or just lounging around, this shirt is a fun way to show off that you are officially a teenager. A great gift for that special 13-year-old in your life!