A stylist and former luxury lingerie specialist has revealed a startling statistic that could change the way millions dress every day. According to Kenzie, who worked for a high-end lingerie brand, a massive 80% of people who wear bras are in the wrong size, leading to widespread discomfort and poor support.
The Three Pillars of a Perfect Bra Fit
In a viral TikTok video posted on her account, @stylingwithkenzie, the expert shared the professional fitting advice she learned on the job, which she says fundamentally 'changed her life'. She broke down the process into three critical areas that most people get wrong.
1. The Band is Your Foundation
Kenzie's first and most crucial tip centres on the bra band. The fit of the band is the most important element for support, not the straps. It should sit parallel around your back, and you shouldn't be able to pull it out more than two inches.
Many make the mistake of fastening a new bra on the tightest hook, concerned about a snug fit. However, bras naturally stretch over time. Kenzie advises that you should always start on the loosest hook to allow for this wear, ensuring a longer-lasting, comfortable fit.
2. Understanding Cup Sizing Dynamics
The second point tackles the common confusion around cup size. Cup size is not static; it changes relative to your band size. For every band size you go down, you should go up a cup size to maintain the same volume.
Signs your cups are too small include breast spillage at the sides or centre, and uncomfortable underwires. Conversely, sagging, puckering fabric, or gaps in the cup indicate a size that is too large. Remember, the primary support comes from the band and cups fitting correctly, not from tightening the straps.
3. Why Bra Shape is a Game-Changer
The final, often overlooked, factor is the style or shape of the bra. Kenzie points out that while most high-street stores only stock around five styles, there are over 25 different bra designs available.
You might be wearing a T-shirt bra out of habit, but your unique breast size, position, and shape may be far better suited to a balconette or plunge style. Wearing the correct shape leads to a smoother, more lifted silhouette and, most importantly, vastly improved comfort and support.
A Viral Response and Fitting Dilemmas Solved
The advice clearly resonated, with the TikTok video's comment section flooded with praise and personal revelations. One viewer called the guidance 'super helpful', while another agreed it was 'great advice'.
The video also became an impromptu consultation space, with users sharing their specific issues. One commenter described having 'spillage at the centre of the cup and space at the top'. Kenzie promptly responded that this was likely an indication they needed a different bra style altogether, not just a different size.
This expert insight, shared on 18 January 2026, underscores that for many, the quest for comfortable, supportive underwear isn't about spending more, but about understanding the simple, professional principles of a proper fit.
