13 year old 13th Birthday Gift Idea: Square Root of 169 Tee-TH

Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 65% Cotton, 35% Polyester, Imported, Machine wash cold with like colors, dry low heat, Funny 13 year old 13th Birthday Gift Idea – Square Root of 169 T-Shirt. When everyone figures out its meaning during your birthday party, they will absolutely LOVE the idea. Square Root of 169 13 yr old best birthday b-day bday geek nerd gift tee. Square root of 169 – 13th birthday gift idea. Shirts tend to run tight, for a looser fit, please order a shirt one size up. This is a PERFECT birthday gift for anyone about to turn 13 years old, so pick one up TODAY for his / her special day!, Lightweight, Classic fit, Double-needle sleeve and bottom hem