Square Root of 169: 13th Birthday 13 Years Old T-Shirt-ln

Solid colors: 100% Cotton; Heather Grey: 90% Cotton, 10% Polyester; All Other Heathers: 50% Cotton, 50% Polyester; Imported; Machine wash cold with like colors, dry low heat; Perfect for any boy or girl that is born in 2005, birth year.Funny simple math problem age number 13yrs 13 years old 13th b-day bday geek geeky nerd nerdy gift idea graphic tee shirt teen card, sweet cool fun great 13 birthday banner, birthday Surprise.; Square Root of 169 13 yrs 13yrs yr best 13th Birthday Years Old b-day bday geek nerd geeky nerdy math mathematic algebra science present pun born in 2005, quote textual saying cool gift ideas joke funny humor sarcastic,; Lightweight, Classic fit, Double-needle sleeve and bottom hem