If you wear a plus size and every bra you own eventually digs, gaps or rides up, you have probably concluded that your body is the problem.
It is not. The problem is how most plus size bras are made.
Scaled versus graded, and why it matters
Most brands design a bra at a sample size, usually a 34B, then scale it up mathematically. Every dimension gets multiplied by the same factor. The band gets longer, the cup gets bigger, the strap stays roughly the same.
That works fine for a coffee mug. It does not work for a bra, because the forces involved do not scale linearly.
A properly graded plus size bra is re-engineered at each size. The band gets wider, not just longer. The strap gets wider and more cushioned, because it is carrying more weight. The cup depth changes, not just the circumference. The side panels get taller.
When you see a plus size bra with the same narrow band and thin straps as the small sizes, you are looking at a scaled bra. It will dig, because the same load is being carried by the same narrow surfaces.
The four failures and what causes each
Straps digging into your shoulders
Cause: the band is not carrying the weight, so the straps are. Almost always the band is too loose, or too narrow to grip properly.
Fix: tighten or size down the band, and switch to a wider, cushioned strap. The band should carry roughly 80 percent of the load.
The band riding up your back
Cause: the band is too loose. It is being pulled upward by the straps because it has nothing holding it in place.
Fix: a firmer, wider band. A wide band grips more surface area and stays level.
Spillage over the top or under the arm
Cause: the cup is too shallow or the coverage is too low. Common in bras that were scaled rather than graded, since the cup got wider but not deeper.
Fix: a full coverage cup with real depth, plus side panels that contain rather than cut.
Back bulge
Cause: a narrow band cutting a line into soft tissue. The tissue has to go somewhere, so it goes above and below the band.
Fix: a wide band with a smooth, tall side panel. The wider the band, the less pressure per square inch, and the less it cuts.
Can a wireless bra really support a plus size bust?
Yes, and this is the misconception that keeps women in painful underwire for years.
The wire is not what supports you. The band supports you. The wire simply gives the cup a rigid edge to hold its shape. Replace that rigid edge with a properly molded, structured cup and you get the same shape without a metal rod pressing into your ribcage.
What matters is whether the bra is actually built for support: wide band, deep molded cup, wide cushioned straps, tall side panels. A soft unlined wire-free bra in a large size will not support you, and that is what gives wire-free a bad reputation among fuller busts.
Our plus size bras are graded, not scaled, and go up to 4XL.
How to measure properly
Two numbers: your underbust, measured firmly and level, and your fullest bust, measured loosely. Full instructions and the complete S to 4XL chart are in our size guide.
One warning specific to fuller busts: measure with a bra on that fits reasonably well, not bare, since an unsupported bust gives a misleading fullest-bust measurement.
If you are between sizes
Size up. Our bands are firm by design, since in a wire-free bra the band is doing the work the wire used to do. A band that is too tight will not support you better, it will just hurt more.
If your band is close but slightly tight, a band extender buys you an inch or two instantly.
What to expect
A bra that fits correctly should be unremarkable. You should not notice it, adjust it, or count the hours. If you are doing any of those things, it is not the right bra, and after enough years of that it is easy to stop believing a right bra exists.
It does. Every order is covered by our 30-day comfort guarantee, so trying one costs you nothing but the time to measure.
