Underwire Bras Size Chart and Fitting Guide for All Women

So, use this guide and get the guesswork out of your hunt for the perfect fit underwire bra. Of course, you can never do this well without the aid of an underwire bras size chart.

A good tip to know when your looking for your underwire bra size: underwire sizes are based on a B cup size. Any B cup will have an underwire that corresponds to its band size. A 32B will be a 32 underwire, a 36B will be a 36 underwire;

E. Emerald

If you’re like most women, you’ve had a few questions about bras. What size should I buy? Will a certain style or brand fit better? How do I find the right fit? (skip straight to the Underwire Bras Size Chart)

Underwire Bras Size Chart and Fitting Guide for All Women size-charts.com
Photo by Scott Goodwill on Unsplash

These are all very important questions because the size of your bra is extremely important, in fact as important as the support it provides. A well-fitting bra can reduce back pain, enhance your posture, and help you feel confident throughout the day. But choosing the right size can be difficult. Sizes range from small, for backless or balconette bras, to extra large, for full coverage styles.

Jump right into the Frequently Asked Questions

Related: Women’s Bra Size Chart, Bikini Size Chart and Sizing Guide, Gucci Bra size charts and fitting guide , Victoria’s Secret Bra Size Chart

Underwire Bras Size Chart Table of Content

How are Underwire Bras Sized?

Related: Push-up Bras Size Chart for Every Woman, Brami Size chart and fitting guide for all sizes

Bras are sized in letters, numbers, and cup sizes. 

The letters represent the band size, while the numbers represent the cup size. For example, a 34B bra has a band size of 34 and a cup size of B. 

In addition to standard cup sizes (A-D), some bras feature cup sizes DD and up (known as D2+, D3+, etc). These bras are designed for women with larger breasts who need extra support and coverage. 

We’ll now proceed to look at aspects of measurement and the ar9us charts that you can rely on depending on what type of underwire bra you are keen to buy. 

underwire bras size chart
Image Source: Emeralderin.com

How to Take Your Measurements

Related: Breast Size Chart for All Shapes, How to Measure Your Body for Clothing Sizes

To find your perfect fit, you’ll need to take some measurements. First, measure around your ribcage, just under your bust. This is your band size. Then, measure around the fullest part of your bust. This is your cup size. 

The chart below will help you determine what sizes to look for when shopping for bras. Remember: it’s important to get fitted every time you buy a new bra, even if you think you know your size! 

Related: All you need to know on Bra Sizing

How to Use Underwire Bras Size Chart

Related: Bralette size Chart And Sizing Guide

So, how do you use an underwire bra size chart to find your fit? 

It’s actually quite simple. All you need to do is find your bust size and then match it up with the corresponding band size. Once you have those two measurements, you can then use the chart to determine your correct underwire bra size. 

See the chart below;

Underwire Bras Size Chart

Related: Bra Size Chart for Aged Women

 Cup Size    
Band SizeABCDE

Another thing to consider when using a chart is your core needs. A good example is age. Since different age groups have different preferences or circumstances, some brands will normally have underwire bras size charts by age.

Others can beak their charts down to diverse options such as underwire bras size chart bikini, underwire bras size chart amps, and underwire bras size chart by height. Others can even have underwire bra size charts that rhyme with bathing suits or underwire bra size chart bandeau. 

How To Measure For a comfortable Underwire Bra Size

Related: Breast Size Chart for All ShapesHow to Measure Your Body for Clothing Sizes

Find Your Underwire Bra size

Find Your Underwire Bra size
Find Your Underwire Bra size

The first step is to measure your band size:

1. Place the measuring tape around your ribcage, under your breasts. Right where the band of your bra would go when you put the bra on. Pretend as if the tape was your bra band. 

3. Make sure it is pulled tight but is not uncomfortable and that the tape is level.

4. Note how many inches you are and add 3 to this measurement. For example, if your ribcage is 31 inches, your band size is 34. If you land on an even number this is your band size.

5. If you land on an odd number, you’ll want to round up or round down to the nearest even number based on your build. Round down if you’re softer (more “plum”) around the band and round up if you’re leaner (more “bony”) and don’t have much give around the band. This is your band size.

The next step is to measure your cup size:

1. Place the measuring tape around the fullest part of your bust. This is usually over your nipples or the “roundest” part of your breasts. You won’t need to pull the tape particularly tight for this measurement it just needs to sit flat, but you’ll still want to ensure it’s level. 

2. Make a note of how many inches you are. This will help determine your cup size.

3. Check the chart above and pick the range you best fall in.

What if Your Measurements Are in Between Sizes?

If your measurements are in between sizes, we recommend ordering the smaller size. This will ensure a better fit and provide the most support. You can still size up if your instincts tell you this is the perfect solution for you. A size up will mean that your bra will fit not so tightly while a size down would most likely feel a little tight. 

Different uses for different underwire bras size charts 

Underwire bras size charts typically list the bra sizes in alphabetical order with the corresponding cup size. But they are not uniform, as they might vary based on different factors as we have already seen. 

For example, if you’re under the age of 30, you would use the A-D cup size range. If you’re over the age of 30, you would use the DD-F cup size range. 

Underwire bras size charts can also be used based on bathing suits (underwire bra size chart bathing suits) or babies (underwire bras size chart baby). 

Lastly, you can use an underwire bras size chart by height (underwire bras size chart by height). This method considers your body height and determines the best fitting bra size for you.

Learn more about useful tips of wearing an underwire bra (video)

Bra Hacks : How To Fix Poking Underwire – Bra Wire Hacks by GLAMRS

Frequently Asked Questions

How do I know what size underwire I need?

Your best bet is to use an underwire bra size chart, which you can use in combination with an underwire comparison chart (underwire bras size chart comparison ) and conversion. An underwire bras size chart is best if you know your current size and want to see what other sizes are available. The underwire conversion chart (underwire bras size chart conversion) is best if you know your bra size in inches or centimeters and want to find the equivalent size in a company’s range of underwire bras. 

How is an underwire bra supposed to fit?

Underwire bras should fit comfortably and securely. The wire should sit flat against your ribcage and should never dig into your skin. The band should be snug (but not too tight) and should never ride up your back. The cups should fully cover your breasts and the straps should be adjusted so that they’re not too tight or too loose. 

What is the largest underwire bra?

The largest underwire bra size is about 46K. Some other large bra sizes include 44L, 45J, and 46H. Bras in these sizes are often difficult to find in stores, so many women have to order them online. 

The first thing you’ll want to do is measure your bust size. Once you have your measurements, you can use them to find your size on the chart. Keep in mind that the largest size may not always be available, so you may have to try a few different sizes before finding the perfect fit. 

Is there an underwire bra for plus size?

Yes! While there are not as many plus-size underwire bras as there are regular-size bras, there are still a few great options that cater to women looking for plus-size underwire bras. 

One of our favorite plus-size underwire bras is the Elomi Smoothing T-Shirt Bra. It comes in both black and nude, and it’s perfect for everyday wear. It has smooth cups that help to give you a sleek look, and it also has a microfiber lining that helps to keep you cool and comfortable all day long.

Another great option is the Vanity Fair Beauty Back Full Figure Wirefree Bra. This bra comes in both black and nude, and it has a beautiful lace overlay on the cups. It’s perfect for special occasions.

Related: Sexy Lingerie Plus Size Chart for Women


Now that you know how to go about sizing for underwire bras, it’s time to find the perfect underwire bra size for you. Remember that different brands have different size charts, so it’s important to measure and compare against the size chart of the brand you are shopping for. 

Keep in mind that a size chart is only a guide, and each brand’s fit may be different. If you’re still not sure which size to buy, it’s always best to go with the larger size. And don’t forget: every woman’s body is different, so don’t be afraid to go up or down a size if necessary. With the right underwire bra, you’ll feel confident and comfortable all day long. 

Picture in this post is by Joe Ciciarelli on Unsplash

Related to Underwire Bras Size Chart