Why size is not enough
A bra size records two circumferences. It says how much volume a cup must hold. It does not say how that volume is arranged. A cup is a three-dimensional shape, and it fits only when its shape is close to yours.
When a bra is the right size and the wrong shape, it misbehaves in contradictory ways: gaping at the top while cutting in below, or loose at the sides while the centre lifts off the chest. If that sounds familiar, shape is your missing piece.
The four features
1. Projection: shallow or projected
This is how far the breast stands out from the chest for its volume. Projected breasts have a smaller base and extend further forward. Shallow breasts are spread over a wider area and sit closer to the chest. Most people are somewhere between.
Projection decides how deep a cup you need. It is the feature most often behind a "right size, wrong fit" problem. Full guide: shallow vs projected breasts.
2. Fullness: on top, on bottom or even
This is where most of the tissue sits relative to the nipple. Full on top means there is as much or more above as below. Full on bottom means most of it is below, with a flatter slope above.
Fullness decides how open or closed the upper edge of the cup should be. Full guide: full on top vs full on bottom.
3. Root: wide or narrow, tall or short
The root is the outline where the breast attaches to the chest. A wide root reaches towards the armpit, and a narrow one stops well short of it. A tall root begins high on the chest, and a short one lower down.
The root decides which underwire fits: how wide, and how high at the sides. Full guide: what is a breast root?
4. Spacing: close set or wide set
This is the gap between the breasts at the centre of the chest. Close set means they touch or nearly touch. Wide set means there is a gap of two or three fingers or more.
Spacing decides the centre panel: how wide and how tall it can be. Guides: close-set breasts and wide-set breasts.
Other terms you will see
- East-west: breasts that point outward, away from each other. See east-west breast shape.
- Conical: more cone-shaped than rounded, tapering towards the nipple. See bras for conical breasts.
- Soft and firm tissue: soft tissue takes the shape of the cup it is put in, and firm tissue keeps its own shape. Soft tissue is more forgiving of cup shape and needs more support from the cup.
- Asymmetric: one side larger than the other, which is true of most people to some degree. See bra fit for uneven breasts.
From shape to bra, in brief
Shopping guides for individual shapes: shallow, projected, conical and east-west.
| If you are | Look for | Be wary of |
|---|---|---|
| Projected | Unlined seamed cups, narrow wires | Shallow moulded T-shirt bras |
| Shallow | Moulded, half-cup and balconette shapes with wide wires | Deep, narrow seamed cups |
| Full on top | Open or stretch-lace upper edges | Firm, closed cup edges |
| Full on bottom | Lower-cut cups, balconettes, half-cups | Tall full-coverage cups |
| Close set | Plunge styles, low narrow centres | Tall, wide centre panels |
| Wide set | Wider centre panels, side support | Very narrow plunge centres |
The full matcher is in which bra style suits my shape?, and each style is described in bra styles explained.
Keep it in proportion
These categories are a way of predicting which bras to try first. They are not precise, people rarely fit one neatly, and two breasts on the same person can differ. Use them to narrow the field, then let the fit check decide.
Frequently asked questions
How many breast shapes are there?
Lists of seven or nine named shapes are popular online, but they are simplifications. For choosing bras it is more useful to describe four separate features: projection, where the fullness sits, the root, and spacing. Everyone is a combination of the four.
Does breast shape change?
Yes. Weight change, pregnancy, breastfeeding, hormones and age all alter shape as well as size. Tissue commonly becomes softer and fullness moves lower over time.
Is one shape better than another?
No. Shapes are simply different, and all are normal. Shape only matters here because bras are cut for particular shapes, and knowing yours saves a lot of trial and error.
Not sure which describes you?
Do the four self-checks →