This page deals with loose or creased fabric in unlined and lightly lined cups. If a firm, moulded cup stands away from you at the top edge, that is gaping, and it has its own guide: why your bra cups are gaping.
Read the wrinkles by position
| Where | Likely cause | Try |
|---|---|---|
| All over | Cup too big | Cup down, same band |
| Bottom of the cup | Band riding up, or cup too deep below | Check the band, then a different shape |
| Top of the cup | Less upper fullness than the cup allows | A lower-cut or stretch-top style |
| Outer side | Cup too wide | A narrower style |
| At the tip | Cup more pointed or deeper than you | A rounder or shallower cup |
All over: the cup is too big
If the fabric is loose throughout, the centre panel sits flat and the wires are comfortably on your ribs, the cup has too much volume. Go down one cup letter on the same band. Do a scoop and swoop first, in case some of you has not yet made it into the cup.
At the bottom
Two different things cause this.
- The wire is sitting too low. If the band is loose, the bra slides down at the front and the wire rests below the crease of the breast, leaving empty fabric between the two. Pull the band down at the back and lift the wires into the crease. If the wrinkles vanish, the band is the problem.
- The cup is the wrong shape below. If your breasts are shallow, or fuller at the top than the bottom, a cup with a lot of depth at its base will not be filled, even when the total volume is right.
At the top
You have less fullness above the nipple than the cup is cut for. This is very common, and more so after weight loss, breastfeeding or with age. Going down a cup tends to make the bottom too small. Change the cut instead: a balconette or half-cup has less upper cup, and a stretch-lace top section will lie flat against you.
At the side or the tip
Loose fabric at the outer edge means the cup is wider than your breast, and the wire will probably feel too far back as well. Wrinkling at the apex means the cup comes to more of a point, or more depth, than you do. Seamed cups vary a great deal in shape between styles, so try another one before changing size.
Size or shape?
A simple rule separates them. Try one cup size down.
- If the wrinkles go and nothing else gets worse, it was size.
- If the wrinkles go but you now spill somewhere, or the wire digs in, it was shape. Go back to the larger size and look for a different cut.
Understanding your own shape makes this much quicker. Start with shallow vs projected breasts and full on top vs full on bottom.
Frequently asked questions
Do wrinkles in a bra cup mean it is too big?
Often, but check where they are. Wrinkles all over mean too much cup. Wrinkles only at the bottom or only at the top usually mean the cup is the wrong shape for you, and a smaller size would not fit either.
Why does my bra wrinkle at the bottom of the cup?
The lower part of the cup is not being filled. Either the cup is too tall or too deep at the bottom for your shape, or the band is riding up so the wire sits below your breast crease.
Is some wrinkling normal in unlined bras?
Slight creasing in thin fabric when you move is normal. Fabric that stays loose or folded while you stand still is a fit issue.
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