Sister Bra Sizes For 30 Bra Band Size

Have you ever tried on your much loved bra and found that it doesn’t fit quite right anymore?

If this happens, you may need to try on a different size - this is where sister sizes come in. If you’re a 30 bra band size, keep reading this blog to find out which sizes are similar to your current size. We’ll guide you towards finding the right, alternative size to give you the perfect level of comfort and support.

What Are Sister Bra Sizes?

Are you are finding that the size you usually go for isn’t quite fitting right in the bra that you love? This can happen for a variety of reasons such as age, weight and even the colour of the dye in the bra but don’t worry we might just have to tweak the sizing slightly to get the perfect fit and this is where sister sizes come in. 

Sister bra sizes are the sizes that surround your bra size. It’s good to know what your sister sizes are, so you can try these on if a new bra isn’t giving you the usual amount of support and comfort.

Read more about sister sizes in our blog.

Size Chart: Sister Sizes for a 30 Band Size

This is our sister size chart based on UK sizing for a 30 band size. 

Find your current bra size in the middle column, and discover what sister sizes we’d recommend for sizing upwards or downwards.

How to Find Your Sister Bra Size

When you’ve located your current bra size on the chart, you’ll be able to read across and discover your sister sizes. There is an option to size up, if the bra you’re trying on feels too small, and an option to size down, if the bra you’re trying on feels too big.

If you go up in band size, you may need to go down in cup size in order to keep the same size cup. If you go down in band size, you may need to choose the next cup size up to keep the same size cup. This is just a guide - please note that sister sizing can be quite complicated as you may need to adjust both the cup size and the band size to get the best fit.

Sister sizes can be other sizes that surround the initial size. Take a look at our example chart based on UK sizing.

Please don't hesitate to give our experienced team of bra specialists a call on 01439 798388 if you would like advice about sister sizes and finding a comfortable and well fitting bra.

Find Comfortable and Supportive Bras from AmpleBosom

With a collection of over 250 bras, we’ve got an incredible range for you to browse on our Bras page. We stock band sizes 28 to 58, and cup sizes AA to N, with many different styles and features to suit the fuller figure on every occasion. You can filter by size, so you can see which bras we have available in your size and your sister sizes.

Bra Recommendations for 30 Band Size and Sister Sizing for 30 Bra Band. 

We have some great options of bras that come in a band size 30 that also gives you the option to size up or down if necessary.

Dynamic Soft Cup Active Sports Bra – AC4014

From Freya this sports bra has sizes ranging from back size 30 D up to a J cup this bra also comes in a back size 28 D to J if we need to come down in the band or size 32 C to J if we need to go up in the band.

A high Impact non wired sports bra, which gives firm support up to a J cup. The wide under band creates a firm hold during exercise with added padded adjustable straps for a unbeatable comfort. Made from a double layered breathable microfiber fabric and comes in either white or Jet colour.

Charlotte Support Soft Cup Bra - 821

Royce has really hit the nail on the head with this non wired bra as it comes in a great range of back and cup sizes. In a band size 30 the cup range is from DD to K and if we need to size down we have back size 28 DD to J and if we need to size up 32 DD to K.

This long running bra has stood the test of time and is a popular bra with our customers here at AmpleBosom. This bra comes with a 33% cotton content which is great for many of our customers as it gives great support yet is kinder to the skin. The full cup provides great coverage with a lovely spotted mesh to the top of the cup. A great everyday bra in three continuity colours of black, white and skintone.  

Initiale Underwired Sports Bra - 07200

Empriente brought this underwired sports bra out a couple of years ago and what a game changer it was coming in D to H in a band size 30 and if you need a little extra room in the band, in a band size 32 C to H cups, but if need to come down in the band size we have the options of cup sizes D to G in a band size 28.

The smooth microfiber cup is breathable, lightweight and supportive and what more do you want from a sports bra. The hidden underwire provides added comfort no matter what form of exercise you are doing. With fully adjustable straps that can be swapped from straight over the shoulder to cross back so if you suffer from slipping straps this bra has the perfect solution. The matching shorts makes this the perfect gym set.

Offbeat Underwired Side Support Bra – AA5451

Another one from Freya, who have the smaller back but bigger busted ladies in mind. Coming in back size 30 D to K and with keeping with the theme in a back size 28 D to JJ and in a back size 32 D to K.

The Offbeat is a firm favourite in the AB office.  Providing a great shape and projection from the three section cup with side support and the shorter underwire makes this the perfect bra for our shorter torso ladies with the bigger bust. Made with a beautiful stretch lace and comes in the continuity colours Black, Natural Beige, Rosehip and white and not forgetting the range of seasonal colours a must have bra for the draw.

If you think it might be time for a new bra and fancy trying a new style or brand and not sure what size it is you need to try. Then don’t hesitate to contact us and the experts at Amplebosom can help advise on the size. 

Bra Measuring and Fitting Advice

For additional advice and information on finding a well-fitting bra, visit our blog posts on:

• Bra Measuring Guide
• Bra Fitting Guide
• Bra Size Guide
• Book a Bra Fitting Appointment in North Yorkshire

Sister Bra Sizes from AmpleBosom

We know that finding your sister size in a new bra can be a little complicated, so our team of friendly experts are here to help. Led by AmpleBosom founder Sally, our team of bra specialists can answer any questions you have and make specific recommendations based on your measurements. Call us on 01439 798388 or get in touch by dropping us an email.

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Written by AmpleBosom 09/11/2019 and edited by Sara 11/07/2024 and Sara/Jess edited 08/08/2024.