Bra sizes explained, from band size to cup size

Short answer: A bra size has two measurements, the band size under the bust and the cup size, and both must fit before a bra sits well. Measure yourself with a tape measure and use the brand's own size chart, because sizes can vary a little from brand to brand.

The band size is the foundation

The band is measured around the ribcage just under the bust, with the tape level all the way round. It should lie flat and snug without pinching. The number tells you how big the band part of the bra needs to be, and that is the part that carries most of the support.

How to measure yourself at home

Stand in front of a mirror and breathe calmly while you measure. Use a soft tape measure and check that it does not slide up your back. If you then measure over the fullest part of the bust, you have two numbers to work with. Write them down so you can compare them with a size chart.

Cup size is the difference between two measurements

Cup size is not a size of its own, but the difference between the measurement over the bust and the one under it. The bigger the difference, the bigger the cup. That is why cup and band belong together. Take a look at the bamboo bra without underwire, where the sizes are often a little more forgiving.

Why sizes can differ between brands

There is no single standard that every brand follows exactly. Cut, fabric and elastic mean two bras in the same size can fit differently. So do not be surprised if your usual size does not fit perfectly in a new brand. Always read the chart for the individual item and choose from that.

Signs that the bra is too small or too big

If the bust spills over the edge of the cup or you can see marks on your skin, the cup is probably too small. If the band rides up your back or the straps dig in, the band is often too big. If the bra sits calmly both front and back, you are close to the right size.

A soft bra when your size falls in between

If you fall between two sizes, a soft, stretchy bra without padding can be easier to fit than a stiff style. The fabric gives a little and shapes itself to the body. It is a good idea to have an everyday bra and a soft one for quiet days, and both can be found under bamboo underwear for women.

Your body changes, so measure again

Your size does not stay the same for life. Weight, exercise, hormones and age can all change how a bra fits. Measure again now and then, especially if your bra suddenly feels different. That is perfectly normal and does not mean you did anything wrong. Ask a friend to help if it is hard to measure alone.

Care that helps the bra keep its shape

Wash the bra following the care label and preferably use a wash bag so straps and hooks do not catch. Let it air dry and avoid the tumble dryer if the label advises against it. A bra keeps its shape best when you rotate between several. Also see bamboo tops for women as a soft alternative.

Frequently asked questions

How do I measure my bra size myself?

Measure the band just under the bust and then over the fullest part. The difference between the two gives the cup size, and you can look up both in the brand's size chart to find your size.

Is it normal to need a different size in a new brand?

Yes, that is completely normal. Brands use different cuts, fabrics and elastics, so the same size can fit differently. Always use the chart for the individual item rather than guessing from an old size.

How often should I measure again?

It is a good idea to measure again when your bra feels different or your body has changed. Many people check once a year, but there is no fixed rule.

You can find the full range at Bamboo-Clothing.com.