7 Signs Your Bra Doesn't Fit (and How to Fix Each One)

Many people wear the wrong bra size without realising it. Bodies change with age, weight, fitness, pregnancy and hormones, and sizing varies from brand to brand. The result is a bra that is "fine" but never truly comfortable.

The good news is that your bra tells you exactly what is wrong. Each common fit problem points to a specific fix. Here are seven signs to look for, what they mean and what to do about them.

1. The band rides up at the back

If the back of your bra sits higher than the front, the band is too loose. The band should provide most of a bra's support, and when it is loose, the weight shifts to your shoulders.

The fix: try a smaller band size. If you go down a band size, go up a cup size to keep the same cup volume. For example, if 36B rides up, try 34C. This is called a sister size. If the bra is old, the elastic may simply have stretched, and it may be time to replace it.

2. The straps keep slipping off your shoulders

Slipping straps can mean they are too loose, set too wide for your shoulders, or that the band is loose and pulling the straps out of position.

The fix: first tighten the straps. If they still slip, check the band using the sign above. Styles with straps set closer together, racerback options or convertible straps often suit narrow or sloping shoulders.

3. The straps dig in and leave red marks

Deep marks on your shoulders usually mean the straps are doing the band's job. This happens when the band is too loose, or when the straps are tightened too much to compensate.

The fix: loosen the straps and check that the band is snug. If you need firm support, look for wider or padded straps, which spread the pressure more comfortably.

4. The cups gap or wrinkle

Empty space at the top or sides of the cups means the cup is too big or the style does not match your shape. Gaping is common if you have a shallow or less full upper chest.

The fix: try one cup size smaller, or a different style. Plunge, balconette and stretch-lace bralettes often suit people who experience gaping in full-coverage moulded cups.

5. Spilling over the top or sides of the cups

If breast tissue spills over the cup edge or is pushed out under your arms, the cups are too small. You might notice a "double bump" under a fitted top.

The fix: go up a cup size. Full-coverage styles may also help if you prefer more coverage.

6. The centre gore does not touch your chest

On an underwired bra, the centre panel between the cups, called the gore, should sit flat against your breastbone. If it floats away from your body, the cups are usually too small.

The fix: try a larger cup size, or a style with a lower centre gore. If you prefer not to worry about this, wire-free bras are far more forgiving.

7. You are on the tightest hook already

A new bra should fit comfortably on the loosest hook. That way, you can move to tighter hooks as the elastic naturally stretches over time. If a new bra only fits on the tightest hook, the band is too big. If an older bra is on the tightest hook and still loose, its elastic has worn out.

The fix: choose a smaller band for new bras, and replace bras that no longer stay snug on the tightest hook.

How to check your fit at home

Put on the bra and fasten it on the loosest hook. Lean forward slightly and settle your breasts into the cups, then stand up and adjust the straps. Now check:

• Does the band sit level all the way around?
• Can you slide two fingers under the band, but not much more?
• Do the cups lie smoothly with no gaps or spilling?
• Can you raise your arms without the band moving?

Look at the bra under a fitted T-shirt too. Any lines, bulges or gaps will show clearly.

Understanding sister sizes

Sister sizes have the same cup volume on a different band. Moving down one band size and up one cup size, or up one band and down one cup, keeps the cup volume similar. For example, 34B, 32C and 36A are sister sizes. This is useful when a bra's cups fit well but the band is too loose or too tight.

When to re-measure

It is worth measuring yourself every year or after any noticeable change in weight, after pregnancy or breastfeeding, or when your bras suddenly start to feel different. Our Fit Finder takes your underbust and bust measurements and suggests a starting size, which you can then fine-tune with the checks above.

A well-fitting bra should be something you barely notice during the day. If yours is not, one of these seven signs will usually point you towards the fix.

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