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-shirt and sleeveless T-shirt 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-shirt typically extends to the waist, although one fashion is for "oversized" T-shirts.