The T-shirt is one of the most popular clothing items in the world, but few people think about where its name comes from. The explanation is surprisingly simple: when laid flat, its body forms a vertical line while its short sleeves extend sideways, creating the shape of a capital letter “T.” This basic design inspired the name, which has remained in use for more than a century.

In the early 1900s, T-shirts were mainly worn as undershirts rather than regular clothing. The United States Navy provided sailors with lightweight cotton shirts because they were comfortable, breathable, and easy to wash. At the time, wearing one on its own in public was generally considered inappropriate. However, workers and farmers gradually began wearing them as outerwear, especially during hot weather, because they were practical and inexpensive.

The T-shirt became a fashion statement during the 1950s, thanks to famous Hollywood actors. Marlon Brando, in *A Streetcar Named Desire*, and James Dean, in *Rebel Without a Cause*, helped popularize the plain white shirt. Their on-screen appearances transformed it from simple underwear into a symbol of confidence, youth, and rebellion.

By the 1960s, T-shirts had developed into a popular way for people to express themselves. Printed slogans, band logos, artwork, and personal messages allowed wearers to show their interests and personalities. What began as a basic piece of clothing gradually became an important part of fashion and popular culture.

Today, T-shirts are worn by people of all ages around the world because they are comfortable, affordable, and easy to style. Despite their evolution from naval undershirts to fashionable everyday clothing, their name still reflects their original shape. The next time you wear one, remember that the familiar name comes from the simple letter its outline resembles.