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A sunken or concave chest — whether from pectus excavatum, a naturally low sternum, or simply a narrow ribcage — can make standard bras fit oddly: the center gore hovers instead of sitting flat, underwires dig into the breastbone, or the cups gap in the middle. This isn’t a medical guide (see a clinician about pectus excavatum itself), just a practical rundown of bra styles that work with a non-flat chest wall rather than fighting it: low-plunge and wireless designs, narrow-band options for a smaller ribcage, and padded styles that fill the center gap without pressure on the sternum. Here are real, current options worth trying.
| # | Product | Price | Where to buy |
|---|---|---|---|
| 1 | Skarlett Blue Adorned Cotton Plunge Wireless Bra | $20-$38 | Amazon · eBay |
| 2 | Pepper Lift Up Bra (Zero-G Wirefree) | $55-$65 | Amazon · eBay |
| 3 | ThirdLove Zero Edge Wireless Push-Up Bra | $60-$68 | Amazon · eBay |
| 4 | Maidenform Love the Lift Push-Up & In Bra (DM9900) | $34-$44 | Amazon · eBay |
| 5 | Wonderbra Ultimate Full Effect Push-Up Underwire Bra | $30-$45 | Amazon · eBay |
| 6 | Natori Feathers Contour Plunge Bra | $48-$62 | Amazon · eBay |
| 7 | AnaOno Delilah Soft Cup Bra | $38-$46 | Amazon |
| 8 | Victoria’s Secret Bombshell Add-2-Cups Push-Up Bra | ~$60 | Amazon · eBay |
| 9 | Curvy Kate Lifestyle Plunge Bra (CK5711) | ~$59 | Amazon · eBay |
| 10 | Elomi Smooth Moulded Bra | ~$69 | Amazon · eBay |
The picks, in detail
Skarlett Blue Adorned Cotton Plunge Wireless Bra
A wireless plunge bra with a low, flexible center gore that conforms to the chest instead of bridging it rigidly — a good starting point if underwire pressure on the sternum is the main problem.
- Wireless plunge design
- Stretch cotton fabric with lace trim
- Low center gore
- Available in narrow-to-full band sizing
- No underwire to dig into a sunken sternum
- Plunge cut sits low instead of gapping
- Less structured lift than an underwire style
- Cotton blend runs warm in summer
Pepper Lift Up Bra (Zero-G Wirefree)
Built specifically for AA-B cups, this wireless push-up uses an internal lift structure instead of a wire, which avoids a rigid bridge pressing on the breastbone.
- Sized for AA, A, and B cups specifically
- Wireless internal lift structure
- Angled padding to fill center gap
- Breathable everyday fabric
- Purpose-built for smaller busts prone to center gapping
- No wire pressure point on the sternum
- Only fits smaller cup sizes
- Pricier than mass-market basics
ThirdLove Zero Edge Wireless Push-Up Bra
A wireless push-up with a seamless, edgeless cup that reduces the hard center-panel feel of a traditional bra, adding lift through padding rather than a bridge.
- Wireless, no-show edge design
- Foam push-up cups
- Multiple color options
- No visible seams under clothing
- No underwire bridge to worry about fit against the sternum
- Smooth under fitted tops
- Runs on the pricier side
- Less support for fuller busts than a wired style
Maidenform Love the Lift Push-Up & In Bra (DM9900)
An underwire push-up with strong center-gap padding, aimed at maximizing cleavage — which as a side effect minimizes the visible space between the breasts and a sunken sternum.
- Underwire with padded push-up cups
- Convertible straps
- Lace-trim demi cup
- Wide size range
- Padding specifically targets center-gap fill
- Widely available in many sizes
- Has underwire, so fit against the sternum needs testing
- Convertible straps can slip on some builds
Wonderbra Ultimate Full Effect Push-Up Underwire Bra
A dedicated maximum-lift underwire push-up; the strong padding and angled cups do a lot of the work of filling a center gap, though the underwire itself needs a careful fit check.
- Full Effect push-up padding
- Underwire support
- 4-way adjustable straps
- Available in multiple colors
- Strong, proven push-up shaping
- Widely stocked at major retailers
- Underwire bridge may need sizing up or down to clear the sternum comfortably
- Not a wireless option
Natori Feathers Contour Plunge Bra
A lightly padded plunge bra known for a soft, second-skin fit rather than heavy structure — a middle ground between a fully wireless bra and a firm push-up.
- Sheer mesh and lace construction
- Light contour padding
- Low plunge neckline
- Underwire, molded cups
- Soft, flexible feel against the chest
- Attractive under low-cut tops
- Has underwire
- Less aggressive gap-fill than a dedicated push-up
AnaOno Delilah Soft Cup Bra
A wireless, pocketed soft-cup bra originally designed for post-surgical and asymmetric chests — its wide armholes and non-molded cups are worth trying if a sunken chest also makes standard cup shapes fit unevenly.
- Fully wireless, non-molded soft cups
- Pocketed cups for optional inserts
- Wide armholes and high sides
- Soft modal fabric
- Designed from the ground up for non-standard chest shapes
- No underwire anywhere near the sternum
- Less shaping/lift than a push-up style
- Smaller brand, fewer physical retail fitting options
Victoria’s Secret Bombshell Add-2-Cups Push-Up Bra
Victoria’s Secret’s current maximum-lift push-up line (successor to the old Very Sexy Bombshell), using heavy angled padding to add visible cup volume and close the center gap.
- Add-2-cup-sizes push-up padding
- Underwire support
- Plunge or strapless versions available
- Wide size and color range
- Strongest push-up effect of the group, useful for a pronounced gap
- Easy to find in-store for a fitting
- Heaviest padding of this list — not for a natural-look preference
- Has underwire
Curvy Kate Lifestyle Plunge Bra (CK5711)
A plunge-cut underwire bra from a brand known for narrower band/wider cup ratios, useful if a small ribcage alongside a sunken chest makes standard bands too loose everywhere else.
- Low plunge cut
- Underwire, moderate padding
- Sized for a range of band/cup ratios
- 3-part cup construction for a rounder shape
- Good option if the ribcage itself runs narrow relative to cup size
- Low plunge minimizes center-gore visibility
- Has underwire
- UK-based sizing can need a size-chart double-check
Elomi Smooth Moulded Bra
A molded underwire T-shirt bra from a brand known for fitting fuller cups on narrower bands well — the smooth, seamless molded cup avoids the visible center-panel structure of a traditional bra.
- Molded, seamless underwire cups
- Smooth finish under fitted clothing
- Wide band/cup ratio range
- 4-part support construction
- Smooth molded cup shows less structure against the chest than a paneled bra
- Elomi’s fit range suits a narrower ribcage with fuller cups
- Has underwire
- Molded cups are more rigid than a soft-cup style, so fit against the sternum should be checked in person
Buying tips
- Try wireless and low-plunge styles first — a rigid underwire bridge is usually the actual source of discomfort on a sunken or concave chest, not the cup shape itself.
- Padded push-up styles reduce the visible gap between the breasts and the sternum as a side effect of adding cleavage, even though that’s not their stated purpose.
- If your ribcage runs narrow, look at brands like Skarlett Blue or Curvy Kate that fit smaller bands well, rather than sizing up a mainstream band to compensate.
- This is a fit guide, not medical advice — if pectus excavatum is causing pain or breathing issues, that’s a conversation for a doctor, not a bra.
As an Amazon Associate and eBay Partner, toptenpick.com earns from qualifying purchases. Prices and availability are subject to change.