Here We have a Beautiful Vintage Single stitch Geological Institute if America short sleeve t-shirt. It reads Ideal Proportions taking a Diamond’s measurements on a vintage Hanes Beefy-T Extra Large, Made in U.S.A of course! I washed this shirt once because i planned on wearing it but It never happened & I need to make room in my closet! but it has no stains, marks, or holes on it. Feel free to ask any questions, the measurements are posted in the pictures. Happy Shopping! VTG GIA Diamond Tee