30B Bra Size Measurement

30B Bra Size Measurement

30B Bra Size Measurement

What is 30B bra size measurement in both inches and centimeters? Read on to find out.

If you are not sure of your bra size, it is important to get your measurements correct. To determine your bra size, you have to find out the difference in measurement between the overbust and the underbust.

We have previously written about measuring your breast size. If you need a refresher, check this guide on how to measure your bra size.

30B Bra Size Measurement

If you are a cup size 30B, this means that your underbust measures between 26-28 inches while the overbust measures between 31-32 inches. In terms of centimeters, the underbust measures 61-71 cm while the overbust measures 79-81 cm.

Here is a chart showing 30B bra size measurements:

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Bra Size Underbust (IN) Overbust (IN) Underbust (CM) Overbust (CM)
30B 26-28 in 31-32 in 61-67 cm 71-81 cm


With that said, here are some frequently asked questions about 30B bras as well as the answers:

Is 30B smaller than 32A?

A 30B bra is 1 band smaller than the 32A. Generally, the difference between the underbust and the overbust denote the cup size alphabet. When the difference is one inch, the cup size is A. When the difference is two inches, the cup size is B.

However, a 30B and 32A are sister sizes, i.e., they have the same cup size but different band sizes. With these two bras, a 32A has a bigger band size than a 30B.

Is 30B bra size small or medium?

30B falls under the small breasts category. A woman with 30 inches band size is a woman with slender figure and B cup is also not a big cup size.

What is 30 bra size in CM?

In terms of centimeters, a woman who wears a 30B bra size measure 61-71 cm on the underbust and  79-81 cm on the overbust. However, a 30 bra size does not give us the full picture when we don’t know the cup size. For example, a 30B and 30D are not the same size. Generally, bras that are higher up in the alphabet are larger than those that are lower in the alphabet.

Therefore, a 30A bra size is smaller than a 30G bra size. This means that to get the correct 30 bra size in cm, you have to specify the cup size also.

Now that we know the correct 30B bra size measurements, check out some of the best 30B bras on the market.

Best 30B Bras

30B Bridal Bra: Evelyn Bra

Evelyn Bra

Available on Brabbly

30B Balconette Bra: Maddona Bra

Madonna Balconette Bra With Crystals

Available on Brabbly

30B T-shirt Bra: Natori Bliss Perfection T-Shirt Bra

Natori Bliss Perfection T-Shirt Bra

Available on Barenecessities| Amazon| HerRoom

30B Padded Bra: Glow Balcony Bra

Glow Balcony Bra (with Crystals)

Available on Brabbly | Amazon | Barenecessities

30B Push Up Bra: Wacoal Embrace Lace Petite Push Up Bra

Wacoal Embrace Lace Petite Push Up Bra

Available on Barenecessities | Amazon | HerRoom

See other 30B bras on our store.

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