This is an authentic MIT shirt purchased at the MIT campus during a trip to America. I always dreamed of studying abroad, but it never happened. I wore this shirt occasionally for a year after returning to Japan, but I'd like to pass it on to someone who loves MIT even more. The size is printed as Youth XLarge, which is a child's XL, but it's about the size of a Japanese adult size M. - Brand: Champion - Color: Gray - Design: MIT logo - Material: 90% cotton, 10% polyester - Size: M (approximately Japanese size M) Thank you for looking.