Bra Size Guides

GG Cup Bras by Band Size (UK) – Find the Best Bras for Your Exact Band Size

This GG cup bras by band size guide helps you find the best bras for your exact band size, with links to detailed pages covering fit, support and recommended styles for every GG band size.

A GG cup sits within the extended UK bra sizing system between G and H. However a 28GG, 34GG and 40GG represent very different cup volumes because cup size always changes with band measurement.

If you want to understand the size itself before choosing a band, see our GG Cup Bras Guide or explore real-world measurements in our How Big Are GG Cups explanation.

If you are unsure of your starting size, begin with the Bra Size Calculator. You can then confirm your fit using our Bra Fitting Advice and compare sizing across brands using the Bra Size Converter.

What Is a GG Bra Size?

A GG bra size is part of the extended UK bra sizing system and appears between G and H in the cup progression. Each step in the sequence typically represents about a 1 inch increase between the band size and the fullest bust measurement.

In most UK size charts a GG cup corresponds to roughly a 10 inch difference between the band measurement and the fullest part of the bust. Because cup volume increases with band size, a 30GG, 34GG and 40GG all represent different overall volumes even though the cup letter is the same.

Understanding GG Cup Size

In the UK bra sizing system, each cup size step represents roughly a 1 inch increase between the band size and the fullest bust measurement. A GG cup sits between G and H in this progression.

If you want to compare neighbouring sizes, you can also explore our guides to G cup bras by band size and H cup bras by band size.

If you want to understand the measurements and real-world appearance of this size, see our guide to how big GG cups are.

You may also find these related guides helpful:

Together these guides explain how cup sizes progress, how band sizes affect volume, and how sister sizing works when adjusting fit.

GG cup sizes are commonly available across many band sizes. For example, you can explore detailed guides for 34GG bras, 36GG bras and 32GG bras to see how this cup size works across different band measurements.

Popular GG Bra Sizes

Some GG sizes appear more frequently in UK fuller-bust brands. These sizes sit near the centre of the band range and are widely produced by brands such as Panache, Freya and Fantasie.

GG Cup Bras by Band Size

This GG cup bras by band size guide helps you compare sizes across the full range, so you can find the most suitable GG bras for your exact band and cup combination.

Why Band-Specific GG Guides Matter

Cup volume increases as band size increases. This means a 40GG holds significantly more volume than a 30GG, even though the cup letter is identical.

Smaller GG bands often rely on firmer band tension and narrower wire structures, while larger GG bands benefit from wider wings, reinforced frames and stronger fabric support. Reading guidance written specifically for your band size can help improve overall fit and comfort.

For example, a 32GG bra combines a GG cup with a smaller band measurement. A 34GG bra sits near the centre of the GG band range and is widely produced by fuller-bust brands, while a 36GG bra holds slightly more overall cup volume.

This GG cup bras by band size guide brings together all available sizes from 28 to 50, helping you compare GG cup bras by band size and choose styles suited to your measurements and support needs.

GG Cup Bra Size FAQs

What is a GG bra size?

A GG bra size sits between G and H in the UK bra sizing system and represents roughly a 10 inch difference between the band size and bust measurement.

Is GG bigger than G?

Yes. GG comes directly after G in the UK cup sequence and represents the next increase in cup volume.

What cup size comes after GG?

The cup size after GG in the UK bra sizing system is H.

Does the same GG cup have the same volume on every band?

No. Cup size always changes with band size. For example a 30GG holds less volume than a 38GG even though the cup letter is the same.

For a broader explanation of how bra sizing systems developed, you may also find this bra size overview helpful alongside the guides on this site.

Browse your specific band size above to find supportive GG cup bras suited to your measurements, or start with our Bra Size Calculator to confirm your size.