This is an authentic Prisoner Chambray Shirt. It's believed to be from the 1950s. OAHU STATE PRISON There's a hole in the left collar. The right shoulder has been repaired. The left armpit doesn't have a hole, but it's starting to show some wear. I bought it 30 years ago and wore it occasionally in the summer. It's a strange thing, but wearing it seems to prevent stains and other damage. The size is M, which is a Japanese size. It's considered a very valuable piece, but it's a used item, so please refrain from purchasing if you are sensitive to such things. Thank you for looking.