Teens Are Sharing Their Prom Dresses to School Instagram Pages to Prevent Dupes: 'An Extension of Identity'

When Stella, 18, chose her prom dress — a red sparkly low-cut gown with a high slit and open back — one of the first things she did was share a photo of it to her high school’s dedicated prom dress page. “It was important because I wanted mine to be unique,” she says. “And I just didn’t want to be matching with anyone.”

Prom dress shopping has always been a big deal. But now, the $16 billion global business is bigger than ever, with American teens (or their parents) typically spending way upwards of $200 on the dress alone (not to mention extravagances like hair, nails, makeup, corsages, limos, lavish after-parties, and the event ticket itself).

And heaven help those who don’t pay attention to their school’s prom dress page — the modern standard for ensuring that no two girls will show up with matching, or even similar, gowns.

Such a page, typically run by a high school’s prom committee, is a grid of collaborative content — each a photo of a girl in her dress, posted by her, often with her face concealed to preserve the surprise element. It’s a way to lay claim to the dress — the social media version of a system used some stores, which keep registries of who buys what from local schools to prevent duplicates.

“If they go to buy something already on the registry, we say they can’t. We would sell the same dress in another color, but most of the kids don’t want it,” says Jessica Cordeiro, owner of Party Dress Express in Fall River, Mass., who’s been seeing gowns with corsets and high slits selling the most this year. “They want to have their own style. If they see something similar to a friend’s dress, they don’t want it.”

Why Is a Unique Dress So Important?

“There’s a concept in psychology that when it comes to dress, we have a desire to both belong and a need to stand out,” says Sarah Seung-McFarland, a licensed psychologist with a background in child development and a focus on fashion and design psychology. “Prom is one of those events where this really plays out.”

By prom night, adds Los Angeles–based therapist Cheryl Groskopf, “that dress has been tried on, photographed, shown to friends, dreamed about for months. And somewhere in that process the brain starts treating it as an extension of identity, not just an outfit.” Further, she says, at this stage of development, “the teenage brain is especially sensitive to anything that feels like a threat to the self,” which is exactly what would be triggered by someone walking in wearing the same dress.

It’s why the Instagram pages makes sense, both therapists say, and reflect a normal concern at that age.

“It’s a time when teens are asserting their identity and trying to figure out who they are and how they want to move through the world,” says Seung-McFarland, who runs the psychology-driven style platform Trulery. “And if used in a light-hearted way, it can be a positive source of inspiration.”

A Source of Drama

Still, the dynamics are like those of any other social media space, and can easily become toxic, “causing teens to be more preoccupied with how they’ll be perceived,” she adds. “This is especially true for teens who struggle more intensely with feeling secure and confident. It’s not inherently harmful, but the page can become a place where comparison starts to influence how teens see themselves.”

In other words, the page can become a source of anxiety, rather than a balm against it. “One of my friends was really annoyed because two girls that are in her friend group are wearing the same color green,” shares Stella, “so now she’s looking for a different dress.”

Reddit is full of threads about these situations, including one from a girl who says that after she bought and shared a photo of her gown, another student bought one that was way too similar. “I’m totally fine in people having similar prom dresses,” she wrote, “this is just too similar though and it’s unlikely that it’s by accident.”

Another thread was started by a senior who only looked at the school’s dress page after making her purchase, and lo and behold saw the exact same item posted by a fellow student. Still, she told her friends, she was keeping the dress.

“They immediately started saying that I shouldn’t because we would be compared and comparison is a common insecurity, and how there is a reason the page exists and I should’ve checked,” she wrote. “Which while I understand, why should I have to sacrifice looking and feeling my best for some girl who hasn’t really spoken with me in my couple of years at this school?”

Moms expressed their own frustrations with the dress preoccupation on a public Facebook page for Class of 2026 parents. “So much drama for a 1-night 4-hour party. The amount of texting, analysis, planning, logistics, especially with social media, is nuts!” wrote one mother, prompting a long thread on the topic.. “They have a dress page where you post, and girls actually have full blown arguments if you pick something even remotely similar. Is this normal? Can we as parents turn down the temperature? Totally different experience 25 years ago. I kind of feel bad for this generation!”

Groskopf says that while humans have always been wired to scan their social environment to see where they belong, “that instinct was built for a much smaller world than the one teens are navigating now.” But social media “means that scan never stops, and the pool of people being compared against is essentially infinite.”

It’s why the dress-sharing trend (when it works!) “is actually a really intelligent collective response to that pressure — teens finding a way to shrink the window of uncertainty before it has a chance to take over,” she says. “That’s a generation adapting in real time to a social environment that moves faster than any nervous system was designed to handle.”