The T-shirt got its name from its simple shape. When laid flat, the body and sleeves form the shape of the capital letter “T” — a surprisingly simple explanation many people never think about.
Originally introduced in the early 1900s as an undergarment, the shirt became widely used after the U.S. Navy issued lightweight cotton versions to sailors. At the time, wearing one publicly without another shirt over it was considered inappropriate.
Over the years, workers and laborers began wearing T-shirts alone because they were comfortable and practical in hot weather. In the 1950s, Hollywood stars like Marlon Brando and James Dean turned the plain white T-shirt into a symbol of rebellion and effortless style.
By the 1960s, printed T-shirts became a powerful form of self-expression, featuring political messages, band logos, and artwork. Today, the T-shirt remains one of the world’s most popular clothing items because it combines comfort, affordability, and timeless style — all inspired by one simple letter.