Gildan Activewear smashed a Guinness World Record on Saturday when it unveiled the world’s largest T-shirt at Country Music Festival in Nashville. At roughly 170 feet wide and 262 feet long—nearly the size of a football field—the gargantuan topper is the equivalent of 12,000 standard-size tees, the same number of shirts Gildan will donate to Keep the Music Playing, a CMA-affiliated charity that promotes music education in Nashville schools.