With a cursory Google search, I discovered that blank versions of the exact shirt I had purchased—the Comfort Colors 1717 Adult Heavyweight Tee—were available on Amazon in a veritable armada ...

In any case, the Comfort Colors T-shirt—specifically the standard-issue 100 percent cotton model no. 1717—checks every box for me. They're boxy but not too boxy. I have a few vintage Hanes ...