Pi Day 2017 3.14159265359 Radius, Diameter, Circumference. A perfect birthday gift or gag gift for a mathematician. This top-quality, 100% cotton T-Shirt is printed direct-to-garment with new age technology that preserves the color-fastness of the design.

• Pi Day 2017 3.14159265359 Radius, Diameter, Circumference.
• Lightweight, Classic fit, Double-needle sleeve and bottom hem

Pi Day 2017 3.14159265359 Radius, Diameter, Circumference.pidayshirt2017