A T-shirt (or tee shirt) is a shirt, usually buttonless, collarless, and pocketless, with a round neck and
short sleeves, that is pulled on over the head and covers most of a person's torso. There are also
long-sleeved T and sleeveless T variants. T-shirts were originally worn as undershirts. This still occurs,
but T-shirts are now also frequently worn as the only piece of clothing on the top half of the body
(except that women usually wear a bra beneath it). A T typically extends to the waist, although one
fashion is for "oversized" T-shirts.