A T-shirt (or tee-shirt, or tee) is a style of fabric shirt, named after the T shape of the body and sleeves. It is normally associated with short sleeves, a round neck line known as a "crew neck", and no collar.

Typically made of cotton fibers knitted in a jersey stitch, they have a distinctive soft texture compared to woven shirts. The majority of modern versions have a body made from a continuously woven tube, on a circular loom, so that the torso has no side seams. The manufacture of T-shirts has become highly automated, and may include fabric cutting by laser or water jet.