Breast Shape Guide
Size is only half the fit. Two people with the same measurements can need completely different bras, because breast shape decides which styles sit well at that size. This guide explains the eight common shapes, which styles tend to suit each one, and which to approach with care — then you can pick your shape below and see its advice at a glance.
Pick Your Shape
All 8 shapes, explained
Read every shape, or use the picker above. Most people are a mix of two shapes — start with the closest match.
Full on top
More fullness above the nipple than below it. The upper cup fills easily, and tissue may press toward the top edge.
Styles that tend to suit: Balconette and full-coverage styles, which give the upper cup room and support.
Approach with care: Plunge styles, which can spill at the top when upper fullness is strong.
Full on bottom
More fullness below the nipple than above it. The lower cup does most of the work, and the top of the cup may sit empty.
Styles that tend to suit: Plunge and balconette styles, which suit a fuller lower cup without demanding upper fullness.
Approach with care: Full-coverage styles, which can gape at the top when upper fullness is light.
Even fullness
Fullness is balanced above and below the nipple. Most styles sit evenly.
Styles that tend to suit: Most styles — use fit and comfort, not shape, to choose.
Approach with care: Nothing specific — if a style gaps or spills, the size is the likelier problem.
Shallow
Tissue is spread wider with less forward projection. The breast sits closer to the chest wall.
Styles that tend to suit: Balconette and half-cup styles, which match a wider, shallower shape.
Approach with care: Deep plunge styles, which can gape when there is little projection to fill them.
East-west
The nipples point outward, away from the centre. There is often a wider gap between the breasts.
Styles that tend to suit: Balconette and side-support styles, which draw tissue toward the centre.
Approach with care: Plunge styles with a very low centre, which can leave the centre feeling unsupported.
Side-set
The breasts sit further apart, with a wider space between them.
Styles that tend to suit: Plunge styles, which visually bring the breasts together and suit a wider set.
Approach with care: Full-coverage styles with a wide, high gore, which can feel like they sit on tissue.
Close-set
The breasts sit close together, with little or no gap between them.
Styles that tend to suit: Plunge styles with a narrow, low gore that can sit flat between the breasts.
Approach with care: Wide-gore styles, where the centre panel cannot sit flat against the chest.
Asymmetric
One breast is noticeably larger than the other. This is very common — most people have some asymmetry.
Styles that tend to suit: Fit the larger side, then tighten the strap on the smaller side. Stretch-lace cups adapt well to a difference.
Approach with care: Rigid, heavily moulded cups fitted to the smaller side — they will gap or spill on the larger side.
How shape affects size
Shape never changes your measured size, but it changes how that size behaves. A shallow shape can gape in a deep cup at the correct size; a full-on-top shape can spill from a plunge at the correct size. That is why the fix for a shape problem is usually a style change, not a size change. Sister sizes help when the band is wrong; they do not fix a shape mismatch.
If you have tried your measured size in several styles and something still feels off, re-check your measurements first, then try the style suggestions for your shape. If both fail, the fit problem solver can narrow down whether the issue is size, shape or style.
Shape plus size: a worked example
Take two people, both measuring 34C. One is full on top: in a plunge bra she spills at the top, because the plunge's low centre cannot hold her upper fullness — but in a balconette at the same 34C, she fits perfectly. The other is shallow: in a deep, projected cup at 34C she gapes, because the cup expects more forward projection than she has — but in a half-cup at the same 34C, she fits perfectly. Same size, different styles, both correct.
That is why shape advice never says a shape is good or bad, and never prescribes a size. It only narrows the styles worth trying first at the size you already measured. If a recommended style still fails, go back to the fit problem solver — the issue may be size after all, and the two tools are meant to be used together.
Frequently Asked Questions
Does breast shape change my size?
No — size comes from your measurements, and shape does not change them. Shape changes which styles fit that size well. Two people with the same size can need different styles, and that is normal.
How do I tell my shape?
Stand in front of a mirror in an unpadded bra or without one, and look at where fullness sits: above or below the nipple, how far apart the breasts sit, and whether the tissue projects forward or spreads wider. Most people are a mix of two shapes — pick the closest match.
Can shape change over time?
Yes. Weight changes, pregnancy, breastfeeding and aging can all change fullness and distribution. If a style that used to work stops working, re-check both your size and your shape.
I have asymmetry. Which side do I fit?
Fit the larger side. A cup that fits the larger side can be adjusted on the smaller side with a tighter strap or a small insert; a cup fitted to the smaller side will spill on the larger side.
Do I need a different size for a different shape?
Usually not. Try the style change first. If a style gaps or spills at your measured size, a different cut in the same size is the better next step than a different size.