Why Do My Bra Cups Gap?

A gap means the cup is bigger than the breast in at least one place. Sometimes the cup is too big. Just as often the size is right and the cup is shaped for a different breast.

Put it on the right way first

Clasp on the loosest hook, lean forward, and scoop and swoop all your tissue into the cups from the sides and underneath. Then adjust the straps. Plenty of gaps close once all the tissue is in the cup. How to put on a bra has the full order.

Gaps come from shape as often as size. Get measured for both

If the cup is too big

Empty space or wrinkling that stays after a scoop and swoop means the cup is too big. With a band that fits, go down one letter: 34B to 34A. If the band is also too big, go down a band and keep the letter: 34B to 32B, a smaller cup on a snugger band.

If the shape is different

• Gap at the top of the cup. Common for shallow breasts in cups built for more projection, and for bottom-full breasts in molded or full-coverage cups. Styles with less coverage at the top often fit closer.
• Gap at the sides. In a wired bra, wires that are too wide for a narrow root leave empty space at the sides of the cups.
• Wrinkles across the cup. A cup with more depth than your breast wrinkles at the top. A shallower style sits flatter.

Breast shape and fit covers projection, fullness, and root width in full.

If one side gaps

Breasts are often different sizes. Fit the larger side, then tighten the strap on the smaller side to bring that cup closer to your body.

Reviewed by Ashley Wen, certified bra fitter. Updated November 12, 2026.