Maternity Bra Size Calculator

To determine your maternity bra size, measure your underbust and fullest part of your bust. Generally, go up one to two cup sizes and one band size from your pre-pregnancy size. This provides room for breast changes during pregnancy and breastfeeding. Fit is crucial for comfort and support during this period.

Maternity Bra Size Calculator

Maternity Bra Size Calculator

Here's a table summarizing how to determine your maternity bra size:

StepMeasurement/ActionWhat to Do
1. Underbust MeasurementMeasure your ribcage just below your bust using a soft measuring tape.Record this measurement in inches.
2. Band SizeIf the measurement is an even number, add 4 inches to it. If it's an odd number, add 5 inches.This gives you your band size.
3. Cup Size MeasurementMeasure around the fullest part of your bust while keeping the tape comfortably snug but not tight.Record this measurement in inches.
4. Calculate Cup SizeSubtract your band size from your cup measurement. Each inch difference represents a cup size.Refer to a sizing chart to determine your cup size (e.g., 1 inch = A cup, 2 inches = B cup, and so on).
5. Determine Your Maternity Bra SizeCombine your band size and cup size to get your maternity bra size.For example, if your band size is 34 inches and your cup size is 36 inches, your maternity bra size is 34B.


How do I know what size maternity bra to get? To determine your maternity bra size, you can measure your underbust (ribcage) and fullest part of your bust. Generally, you may need to go up one to two cup sizes and one band size from your pre-pregnancy size.

Should I size up when buying a maternity bra? Yes, it's common to size up in both cup and band size when buying a maternity bra, typically by one to two sizes.

What is a maternity vs. normal bra? Maternity bras are designed with features like stretchy fabric, adjustable straps, and extra hooks to accommodate breast changes during pregnancy and breastfeeding. They provide more comfort and support for changing breasts compared to regular bras.

What week should I buy a maternity bra? Most women start looking for maternity bras around the second trimester when their breasts begin to grow and change.

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How many sizes should I size up when pregnant? You may need to size up by one to two cup sizes and one band size during pregnancy.

When should you stop wearing underwire bras when pregnant? Many experts recommend avoiding underwire bras during pregnancy, as they can become uncomfortable as your breasts change shape. It's generally advised to switch to non-wired bras for comfort and to reduce potential pressure on milk ducts.

How many maternity bras do I need? Having 2-4 maternity bras is a good starting point, as it allows you to rotate them and ensures you have clean ones on hand when needed.

Can I go braless while breastfeeding? You can go braless occasionally, but it's often more comfortable and practical to wear a supportive nursing bra, especially when you're out and about to provide easy access for breastfeeding.

How do you pick the right maternity bra? Choose a maternity bra that fits comfortably in the band and cups, provides good support, has adjustable straps, and allows for easy nursing access with clips or flaps.

Does your bra size go back down after pregnancy? After breastfeeding and as your body adjusts post-pregnancy, your breast size may change again. Some women return to their pre-pregnancy size, while others may remain slightly larger.

What bra to wear during labor? During labor, comfort is key. A soft, wireless bra or a nursing tank with a built-in bra can provide support while allowing easy access for skin-to-skin contact or breastfeeding.

What bra is most comfortable for pregnancy? Wireless, seamless, and stretchy maternity bras are often the most comfortable during pregnancy as they adapt to your changing body.

Do I have to buy maternity clothes or can I just size up? You can size up in regular clothing during early pregnancy, but maternity clothes are specifically designed to accommodate your growing belly and offer more comfort and style.

Should I wear a maternity bra in bed? Wearing a comfortable, light support maternity bra in bed is a personal preference. Some women find it more comfortable for support during sleep, while others prefer going braless.

Is 12 weeks too early for maternity clothes? It's not too early to start wearing maternity clothes if you're already feeling uncomfortable in your regular clothing. Many women start transitioning to maternity wear around 12-16 weeks.

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Will my breast sag if I don't wear a bra during pregnancy? Not wearing a bra during pregnancy won't necessarily cause breast sagging. Genetics, weight fluctuations, and breastfeeding are more significant factors in breast changes.

Do you need maternity clothes at 3 months? At three months, you may not need full maternity clothing yet, but you might find maternity pants with stretchy waistbands more comfortable.

Does belly size affect baby size? The size of your belly during pregnancy isn't directly proportional to the baby's size. It's influenced by factors like amniotic fluid, uterine muscle tone, and your body's shape.

Does parent size affect baby size? Genetics plays a role in a baby's size, but it's not the sole determining factor. Nutrition, prenatal care, and overall health also impact a baby's size.

Does your waist get bigger during pregnancy? Yes, your waist typically gets larger during pregnancy as your baby grows and your body undergoes various changes to accommodate the pregnancy.

At what point in pregnancy should you stop wearing underwire bras? Most women stop wearing underwire bras in the second trimester or whenever they start feeling discomfort due to the underwire.

Is it okay to wear the same bra for 2 weeks? Wearing the same bra for two weeks without washing it is generally not recommended for hygiene reasons. It's advisable to rotate between a few bras and wash them regularly.

What should you not pack for labor? Avoid packing unnecessary items like valuables, too many clothes, or items prohibited by the hospital, such as candles or strong scents.

How many maternity bras do I need for hospital? Having one comfortable maternity bra for the hospital is sufficient.

How many pads do you go through a day postpartum? On average, you may go through 4-6 maternity pads per day during the early postpartum period.

Do you wear a bra during labor? Whether or not to wear a bra during labor is a personal choice. Some women prefer the comfort and support of a soft, wireless bra, while others find it more comfortable to go braless.

Can I use sanitary towels instead of maternity pads? While you can use sanitary towels in a pinch, maternity pads are designed to absorb the heavier flow postpartum and provide better coverage and comfort.

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Is it better to go braless while breastfeeding? Breastfeeding without a bra is a personal choice. Some women prefer to go braless at home for comfort, but a supportive nursing bra can be more convenient when nursing in public.

What happens if you wear your bra 24/7? Wearing a bra 24/7 can potentially cause discomfort and skin irritation, as your breasts need some time to breathe and relax without compression.

How many bra sizes do you go up when breastfeeding? During breastfeeding, you may go up by one to two cup sizes due to increased breast fullness.

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