There is actually a rule, and now I finally understand the reason.

If you’ve ever noticed that women’s shirts button on the left while men’s button on the right, you’ve spotted a centuries-old design that still shapes modern fashion. Though it seems trivial today, the reason behind this difference reveals much about history, gender roles, and class. In the 18th and 19th centuries, wealthy women didn’t usually dress themselves — their maids did.

Since most people were right-handed, placing the buttons on the left made it easier for maids to fasten garments while facing their mistress. This design, created out of convenience for servants, soon became a status symbol associated with elegance and femininity. The idea that women were to be dressed, rather than to dress themselves, was quietly stitched into their clothing.

For men, however, practicality ruled. Right-handed men often carried weapons on their left side. Having buttons on the right allowed them to unbutton coats quickly and draw a sword or firearm when needed. Over time, this design moved from military uniforms to everyday attire, marking a clear visual divide between men’s and women’s fashion.

Though today few people rely on maids or carry swords, fashion has preserved these traditions as a nod to history. The placement of buttons serves as a small yet enduring symbol of how society’s past—its class systems, gender expectations, and habits—continues to shape what we wear. A shirt’s buttons, it turns out, tell a story far older than the fabric itself.