40th Birthday T-Shirt Square Root of 1600 40 years old Humor-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, This Square Root of 1600 40th Birthday T-Shirt is perfect Funny Birthday Shirt for any 40 year old that”s into Nerdy Humor, Algebra, Mathematics, or Science. Makes a great Funny Math Gift for Christmas as well. Our Funny Math Birthday T-Shirts feature a vintage text t-shirt design and come in Mens Womens and Youth sizing, a variety of colors and tend to fit on the slimmer side. If you prefer a loose fit please order one size up. Lightweight, Classic fit, Double-needle sleeve and bottom hem