By Benjamin GroffMedia© | benandsteve.com | ©2026

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Someone asked during a conversation yesterday where the T-shirt got its name.

I honestly had never given it much thought. It was just… a T-shirt. That’s what everyone called it when I was growing up. A plain white undershirt hanging on a clothesline, folded in dresser drawers, or tossed over the back of a chair was simply a “T-shirt.” No explanation ever needed.

But the question stayed with me.

But the question stayed with me.

Everything has an origin. Even the most ordinary things we stop noticing had to begin somewhere. Somebody, somewhere, had to create it, name it, wear it, and eventually make it part of everyday life. So I decided to do a little digging.

What I found was surprisingly interesting.

A Shirt Shaped Like a Letter

The most widely accepted explanation is also the simplest: the shirt resembles the shape of a capital “T” when laid flat. Sleeves stretched outward, body hanging downward — there it was. A “T-shirt.”

Sometimes the simplest answer really is the correct one.

But the story goes deeper than shape alone.

The U.S. Navy and the Birth of the Modern T-Shirt

The modern T-shirt is largely credited to the United States Navy around 1913. Sailors were issued lightweight, short-sleeved cotton undershirts to wear beneath their uniforms.

At the time, heavy wool uniforms were common, uncomfortable, and brutally hot below deck. These new cotton shirts were breathable, washable, inexpensive, and practical. Sailors began wearing them while working, especially in warmer climates.

Before long, they were being worn not just under uniforms — but by themselves.

That simple military undershirt quietly became one of the most recognized articles of clothing on Earth.

Did the “T” Mean “Training”?

There are also theories suggesting the “T” stood for “training,” as in “training shirt,” particularly tied to military use. While interesting, historians generally lean toward the far simpler explanation involving the shirt’s shape.

Still, like many pieces of history, a little mystery remains.

Literature Helped Spread the Name

One of the earliest known uses of the term “T-shirt” in popular culture came from author F. Scott Fitzgerald in his 1920 novel This Side of Paradise.

That surprised me.

The idea that something now hanging in nearly every closet in America once sounded modern enough to appear as fresh terminology in literature is hard to imagine today.

The Dockworker Theory

There is also an older and far less accepted theory that similar garments called “tea shirts” were worn by dockworkers as far back as the late 1600s. Some believe the term gradually evolved into “T-shirt.”

Most historians, however, still point back to the military undershirt and the shirt’s unmistakable shape as the true origin.

From Underwear to American Icon

What fascinates me most is how something designed simply as underwear became a cultural symbol.

The T-shirt went from military practicality to factory wear, then to rebellion, fashion, concerts, politics, advertising, and self-expression. It became a billboard for causes, rock bands, opinions, humor, memories, and identity itself.

Everybody owns one.

Rich or poor.
Young or old.
Farmer, mechanic, teacher, police officer, celebrity, or kid riding a bicycle down a dusty street in summer.

The T-shirt may be one of the few pieces of clothing that truly belongs to everybody.

And all these years later, most of us never once stopped to ask why it was called that.

Sometimes the most interesting stories are hidden inside the most ordinary things.

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Benjamin Groff II
Groff Media © Truth Endures