Bra Size Converter
UK brands use different cup letter ranges, so the cup letters they offer do not always match. This bra size converter makes it easy to compare cup letters across more than 60 UK brands and see how their size ranges align.
Bra Size Converter – Compare UK Cup Sizes by Brand
Your Current Size
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What Is This Bra Size Converter?
UK lingerie brands use different cup letter ranges, so the letters they include can vary from brand to brand. Some use double letters such as FF or GG, while others use a shorter set of cup letters. As a result, the cup letters available are not always the same between brands.
This tool helps you compare cup letters across more than 60 UK brands. After checking your own UK size using our Bra Size Calculator, you can use this bra size converter to see how cup letters align between brands such as Freya, Fantasie, Elomi, Panache, Curvy Kate or Pour Moi.
Why Bra Sizes Differ Between Brands
UK bra sizes use the same inch-based measurement system, but each brand chooses its own set of cup letters. As a result, the letters used at similar cup sizes can vary between brands.
Each UK brand chooses how to label the bra sizes in its range. For example, the bra size that Freya labels as 36G is labelled as 36H in Triumph. The underlying measurements are the same — the difference is simply in the cup letter each brand uses to name that bra size.
If you are exploring new brands, browsing their individual size guides can help. You can find all brand guides in one place in our Lingerie Brand Size Guide Index.
For a deeper look at how bra cup volume is calculated and how breast weight can be estimated, you may find this external resource helpful: Cup Volume & Breast Weight (Wikipedia) .
How the Bra Size Converter Works
Each UK brand chooses its own set of cup letters, especially in the fuller cup sizes. The converter looks at the bra size (band and cup) you select and shows how that same size is labelled in another brand. This gives a clear, like-for-like cup letter comparison wherever both brands offer that size.
- Uses each brand’s own cup lettering system
- Shows direct cup letter equivalents where available
- Displays “not available” if a brand does not offer that cup letter
- Helps you compare across popular UK brands such as Bravissimo, Freya, Elomi and others
This bra size converter focuses on how UK brands label their bra sizes. If you need to compare UK sizes with international systems such as EU, US or AU, please refer to the international size charts provided in each brand’s own size guide.
How to Use the Bra Size Converter
This tool helps you compare how different UK brands label the same bra sizes. Here’s the simplest way to use it:
- Start by checking your current UK size using the Bra Size Calculator.
- Select the brand you normally wear, then choose your usual band and cup letter.
- Choose the brand you want to compare with — for example, Freya to Panache.
- Click Convert to see how that same bra size is labelled in the other brand.
After you select your current brand, the cup size menu will only show the cup letters that this brand produces. When you choose another brand to compare with, the converter checks whether that brand offers the equivalent bra size. If the other brand does not make that size, the result will display a clear message such as “No equivalent size found in Triumph.” For full size charts and availability, you can visit the individual size guides for brands such as Elomi, Curvy Kate or Fantasie.
Brand Families & Product Focus
Many lingerie brands sit within larger groups or companies. Brands that share a parent company often draw from similar design resources, materials, or production methods. This does not mean the bras will fit the same, but it can explain similarities in size ranges, style availability, and overall product focus.
Brand Families
The groups below outline how some well-known UK lingerie brands are organised. This can be helpful when exploring new brands, as families often cover a wide range of sizes, everyday styles, and supportive options.
Wacoal EMEA
Brands: Freya, Fantasie, Elomi, Goddess, Wacoal
This group covers a wide size spectrum, from everyday lingerie to specialist ranges designed for fuller figures and fuller busts.
Panache Lingerie
Brands: Panache, Cleo, Sculptresse
These brands offer a wide variety of styles across many band and cup sizes, including fashion lines and options designed with additional support features.
Triumph International
Known for everyday underwear and comfort-focused collections ranging from seamless basics to supportive wired styles.
Fit Types at a Glance
Bra design varies between styles and collections. Some ranges focus on everyday comfort, others offer fashion-led details, and some concentrate on extended size options. The categories below give a simple overview of the general product focus you may find across different brands. These are not fit predictions or shape recommendations, but broad descriptions of the kinds of ranges brands often produce.
Brands Offering Extensive D+ Ranges
These brands provide a wide selection of sizes above a D cup, covering everyday pieces, fashion collections and specialist full-bust support.
Includes: Freya, Fantasie, Panache, Cleo, Curvy Kate, Bravissimo, Pour Moi
Brands With Extended Band Ranges
Some brands offer higher band sizes and collections designed with features that support fuller figures.
Includes: Elomi, Goddess, Sculptresse, Evans, Yours
Everyday & Classic Underwear Brands
These brands offer a wide selection of everyday staples, T-shirt bras, soft styles and classic silhouettes.
Includes: Triumph, Wacoal, Playtex, Bestform, M&S Collection, Next
Fashion & Design-Led Brands
These brands focus on trend-led styling, lace, colour and fashion-forward details across a variety of collections.
Includes: Gossard, Bluebella, Aubade, Ann Summers, Victoria’s Secret
Maternity & Nursing Collections
These brands offer maternity and nursing pieces designed with soft fabrics, flexible sizing and practical features.
Sports & Activewear Brands
These brands offer sports bras and activewear collections designed for movement and everyday activity.
Includes: Shock Absorber, Freya Active, Panache Sport, Berlei, Sweaty Betty, Lululemon
Note: These categories describe general product collections. They are not recommendations or indicators of fit or shape.
Bra Size Converter FAQs
How do I use the Bra Size Converter?
Select your current UK brand, band size and cup size, then choose the brand you want to compare.
The converter will show how the cup letters align between the two brands.
Does this work for all UK brands?
The converter includes many popular UK lingerie brands such as
Freya,
Fantasie,
Elomi,
Panache
and many others.
How do I find my UK bra size?
Use our
Bra Size Calculator
to enter your bust and underbust measurements. This will give you a starting UK band and cup size.
Can I check my fit after finding my size?
Yes — you can use our
Bra Fitting Advice
guide for step-by-step checks to help you assess band, cup and strap adjustments.
What if the cup letter doesn’t exist in the brand I select?
If a cup letter does not appear in a brand’s range, the converter will display a message to let you know.
Can I convert UK sizes to international sizing?
This page compares how UK brands label the same bra sizes. For international size labels such as EU, US or AU,
please refer to the size charts in each brand’s own size guide.
For more size help, explore our Bra Size Calculator, our Bra Fitting Advice and the full Lingerie Brand Size Guide Index.