A Better Bra Fit Starts With Shape

Breast shape is not one label

Shape isn't a single category you fit into permanently. It has several independent dimensions, and it can shift with support, position, weight change and time. The cards below describe dimensions to notice, not fixed types to identify with.

• Fullness

  Where the tissue is fullest relative to the wire affects which cup shapes gape or cut in. Bottom fullness often pairs well with a plunge or demi cup. Top fullness or even fullness often suits a fuller, more structured cup. If a cup consistently gapes at the top while fitting well at the bottom, or the reverse, that's a fullness clue rather than a sizing one.

• Projection

  Projection is how far the tissue extends forward from the chest wall. A projected shape can push against a shallow cup, making the band feel tighter than the measurements alone would predict. A shallow shape can leave visible empty space in a deep, rounded cup even when the volume is otherwise correct.

• Root width

  Root width is how wide the breast tissue is where it meets the chest wall, which is what the wire needs to match. Empty space at the side of a cup doesn't always mean the cup is too big. It can mean the wire is wider than your root width, which is a shape mismatch rather than a volume one.

• Spacing

  Spacing affects how a gore behaves. Close-set breasts paired with a wide or high gore often keep the centre panel from lying flat, a construction and spacing interaction rather than a defect to fix with a smaller size. Wider spacing tends to suit lower or more flexible gores.

• Tissue firmness

  Firmer tissue tends to hold its own shape with less built-in support, so a less structured or wireless style can work well. Softer tissue often benefits from a more structured or moulded cup that gives it somewhere to settle.

• Asymmetry

  Most people have some difference in size or shape between left and right. True symmetry is uncommon. Fit the larger side first, then adjust the smaller side with strap changes, a flexible or stretch-lace cup, or a removable insert.

Shape clues that can affect calculator results

Circumference-based measurements can over- or underestimate usable cup volume for some shapes. A very projected or asymmetric shape is harder for two numbers to describe than an average one. We don't publish an accuracy percentage for this, because it isn't a number that can be measured honestly from body measurements alone.

Find a style to try first

Answer the shape questions above for a personalised set of observations, then combine them with a Fit Checker result for a fuller picture. Run the Fit Checker

Haven't calculated a starting size yet? Start with the calculator first.