The T-shirt is one of the most common clothing items in the world, yet its name comes from something very simple. It is called a “T-shirt” because of its shape. When laid flat, the body forms a vertical line and the sleeves extend horizontally, creating the outline of the capital letter “T.” This basic shape became the name that is still used today.

The history of the T-shirt goes back to the early 1900s, when it was mainly used as an undershirt rather than outerwear. The United States Navy issued lightweight cotton crew-neck shirts to sailors because they were breathable, comfortable, and easy to wash. At the time, these shirts were meant to be hidden under uniforms and were not considered suitable for public wear.

Later, workers such as factory employees, farmers, and laborers began wearing T-shirts on their own, especially in hot weather, because of their comfort and practicality. Their popularity grew even more in the 1950s when Hollywood helped turn them into fashion items. Actors like Marlon Brando in A Streetcar Named Desire and James Dean in Rebel Without a Cause made plain white T-shirts appear stylish, bold, and rebellious.

By the 1960s and afterward, T-shirts evolved into a form of self-expression, featuring printed slogans, band logos, artwork, and personal messages. Today, they are worn worldwide by people of all ages and remain popular for their comfort, affordability, and style. Despite their cultural evolution, the name still reflects the simple T-shaped design that started it all.