A demi bra is a half-cup style designed to cover roughly half to three-quarters of the breast. The word “demi” comes from French and means “half,” which accurately describes the reduced cup height. The top edge of the cup typically ends about an inch above the nipple and slopes or curves gently toward the center, creating an open, rounded neckline. Straps are usually set wider than those on full-coverage bras so they stay hidden under scoop necks, boat necks, square necklines, and many off-shoulder styles.
This construction lifts the breast from below while allowing more of the upper breast to show. The result is a naturally elevated silhouette with moderate cleavage rather than the full enclosure of a traditional full-cup bra or the deep center V of a true plunge.
Other Names for Demi Bras
Demi bras are also called demi-cup bras, half-cup bras, or half bras. Some retailers use “shelf bra” interchangeably, though a true shelf style is often less structured. The term “demi balconette” or “demi plunge” appears when the neckline is especially low or the gore is shorter. Because the industry uses these labels loosely, two bras both marked “demi” can differ in coverage, strap placement, and center height. Checking the actual cup height and neckline shape is more reliable than relying on the name alone.
Reasons Women Choose Demi Bras
Many women reach for a demi bra when they want support under lower or wider necklines without the bra edge showing. The lower cup and wider-set straps make demis especially practical for V-necks, wraps, scoops, and dresses that would reveal a full-coverage cup or narrow-set straps.
Beyond neckline compatibility, demis deliver a lifted, rounded shape without the bulk of heavier padding. Women who prefer a natural look rather than dramatic cleavage often find the style flattering. The open upper edge also works well for those who dislike the feeling of fabric high on the chest. Demis can function as everyday bras for people who want less coverage, or as special-occasion pieces when a bit more décolletage is desired. Because they sit lower, they frequently create a smoother transition under fitted tops compared with higher-cut styles.
Breast Shapes That Work Well with Demi Bras—and Shapes That Do Not
Demi cups are particularly suitable for shallow breasts. The lower cut reduces the chance of empty space at the top of the cup, a common issue when shallow tissue is placed in a full-coverage style. Full-on-bottom and teardrop shapes also tend to do well; the shorter cup lifts lower volume upward and fills more evenly. Short-rooted breasts (where tissue does not extend high on the chest wall) often find demis a natural match because there is less fabric above the breast to gape.
Wide-set or average-root breasts frequently benefit from the gentle centering effect of the angled cup. Smaller to medium bust sizes (roughly A through D) usually find the proportion balanced and easy to fit. Even some larger busts can wear demis successfully when the style includes firm underwire, a supportive band, and adequate side containment.
Demi bras are less ideal for very full-on-top shapes. Tissue that sits higher can spill over the shorter cup edge, creating an uneven or uncomfortable fit. Highly projected breasts with narrow roots sometimes need deeper cups than many molded demis provide; the result can be overflow or a flattened appearance. Soft or relaxed tissue may also push over a rigid molded top edge more easily than it does in a stretch-lace or seamed style. Very heavy busts that require maximum containment often prefer full-coverage or structured balconette styles for all-day security, though a well-engineered demi can still be worn for specific outfits.
Many demis share design traits with plunge bras—especially those with a lower center gore and inward-angled cups. True plunge bras, which feature an even lower V-shaped center, work best for close-set breasts, full-on-bottom shapes, and round or evenly distributed tissue. They are less reliable for very wide-set breasts (the low gore may not sit flat) and for full-on-top shapes that risk spillage. When choosing between a standard demi and a deeper plunge-demi, the deciding factors are usually the neckline of the clothing and how much center separation is desired.
Additional Information for Choosing and Wearing Demi Bras
A correctly fitted demi has a firm, level band that carries most of the weight, underwires that follow the breast root without sitting on tissue, and cups that fully contain the breast after a proper scoop-and-swoop. The top edge should lie smoothly against the skin with neither bulging nor gaping. Straps should stay in place without digging.
Root width matters as much as cup size. Wide roots need wider underwires that sit fully on the ribcage; narrow roots need shorter wires that do not dig into the armpit or sternum. Average roots have the broadest selection. Molded demis give a smooth look under thin tops, while unlined or stretch-lace versions accommodate asymmetry and softer tissue more easily. Push-up versions add volume but can feel warmer or less flexible for daily wear.
Demi bras pair especially well with scoop necks, moderate V-necks, sweetheart necklines, and many wrap styles. They are less practical under high crew necks or turtlenecks, where the lower cup edge can create a visible line. Wireless demis exist and can be comfortable, but most offer less defined lift than wired versions.
Because labeling varies, reading product descriptions for cup coverage percentage or looking at side-view photos helps set realistic expectations. Starting with a style matched to your root width and fullness distribution—and confirming the fit with the band firm and tissue properly scooped—greatly increases the chance of a comfortable, flattering result that works under the clothes you actually wear.
List of Demi and Demi-Style Bra Examples Organized by Root Width
Wide Roots / Often Shallow Profiles
- Natori Feathers Contour and other Natori demi styles
- b.tempt’d Ciao Bella
- Betsey Johnson Eyelet Lace Demi
- Claudette Sophia Icon Demi
- Cleo Juna and similar half-cup styles
- Maidenform Custom Lift Demi
- CUUP Demi
- Victoria’s Secret demi and semi-demi styles
- Freya Deco molded versions
- Parfait Charlotte and related padded styles
- Camio Mio Lightly Lined Demi
Average Roots
- Wacoal demi and seamless demi styles (including Aphrodite)
- Chantelle Pyramide and other demi cups
- Aerie demi and lightly lined styles
- ThirdLove demi options
- Maidenform and Bali molded demi t-shirt styles
Narrow Roots / Often Projected Profiles
- Ewa Michalak CH, CHP, and HP half-cup styles
- Comexim 3HC and half-cup styles
- Panache and Cleo styles
You can read our articles about bra fitting and breast shape on our Blog. We also offer custom Breast Shape Mapping so you can be confident when narrowing down your next, best-fitting bra options. If you have shape, measuring or fitting questions, we are here to help! Get in touch with us via our Contact Page anytime.
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