Do you enjoy calculating circumferences? Are you the kind of person who gets unreasonably excited about March 14th? Can you recite more than two digits of pi? If you answered “yes” to any one of those, we’ve got the perfect pair of socks for you! Our American Pi Crew Socks feature the pi symbol on a red, white, and blue collegiate design. 59% Cotton / 38% Polyester / 3% Elastane. Made in Korea. Our threads are certified by OEKO-TEX® Standard 100, which means we leave out harmful chemicals to keep your skin safe and happy. Approximately fits men's shoe size 7-13 and women's shoe size 8.5-14.5.