Bra Size Guides

GG Cup Bras – Brands That Make GG Cups & How to Find Your Size

Finding supportive bras in a UK GG cup can be frustrating, especially as many mainstream brands do not manufacture this size. This guide explains what GG cup means in UK sizing, which brands make it, and how to confirm your correct fit before buying.

To confirm your starting size, begin with our Bra Size Calculator, then compare sizing differences between brands using our Bra Size Converter.

Who This Guide Is For

Women who wear a UK GG cup
Those sized out of high-street brands
Fuller-bust shoppers needing dependable everyday support
Anyone confused by GG vs G or FF sizing
Customers repeatedly sister-sized due to limited availability

Why Not All GG Cup Bras Are the Same

Although GG cup is a recognised UK bra size, not all GG cups have the same volume. Different brands use slightly different UK cup letter sequences, even though the underlying sizing rule remains consistent.

Cup sizes are based on the difference between the band measurement and the fullest bust measurement. Each 1 inch increase equals one cup size in UK sizing.

Traditional UK cup sequences follow: B, C, D, DD, E, F, G, H, J, K.

Fuller-bust brands use an extended sequence: D, DD, E, F, FF, G, GG, H, HH, J, JJ, K, KK, L, LL.

The measurements increase in exactly the same way — only the letters differ. Both systems are valid UK sizing structures but are not interchangeable by letter alone.

The GG cup is part of the UK’s extended bra size sequence, which includes several double-letter cup sizes such as FF, GG and HH. These represent additional steps in the progression rather than half sizes. For a full explanation of how these sizes fit into the UK system, see our Double Cup Bra Size Guide .

If you are wondering what this size looks like in practical terms, see our guide explaining how big GG cup sizes are and how cup volume changes across different band sizes.

UK vs US Bra Sizes

Bra sizing systems vary slightly between regions. Most specialist fuller-bust brands such as Panache, Freya, Fantasie and Elomi follow the UK cup size sequence, which includes double letters such as FF, GG and HH.

Some US brands use a slightly different lettering system, which can create confusion when comparing sizes internationally. To understand how the sizing systems relate, see our UK vs US bra size comparison guide .

Important:
A cup size is not one fixed volume. Cup volume increases as band size increases, so a 32GG, 36GG and 44GG are all very different in capacity, even though the cup letter is the same.

Always consider both band size and cup size together.

UK Brands That Make GG Cup Bras

Bravissimo – Bands 28–40, cups D–L View size guide
Freya – Bands 28–42, cups B–K View size guide
Panache – Bands 28–46, cups B–K View size guide
Elomi – Bands 32–48, cups B–LL View size guide
Sculptresse – Bands 34–46, cups D–K View size guide

GG Cup Band Sizes by Brand

Bravissimo: 28GG, 30GG, 34GG, 36GG, 38GG, 40GG
Freya: 28GG, 30GG, 32GG, 34GG, 36GG, 38GG, 40GG, 42GG
Panache: 28GG, 30GG, 32GG, 34GG, 36GG, 38GG, 40GG
Elomi: 32GG, 34GG, 36GG, 38GG, 40GG, 42GG, 44GG, 46GG
Sculptresse: 34GG, 36GG, 38GG, 40GG, 42GG, 44GG, 46GG

GG Cup Bras by Band Size

How to Find Your Correct GG Cup Size

Measure your underband and fullest bust carefully, then enter your measurements into our Bra Size Calculator to get a recommended UK starting size.

For measuring guidance and detailed fit checks, see our Bra Fitting Advice.

GG Cup Bra FAQs

Is GG bigger than G?
Yes. In extended UK sizing, GG is one cup step larger than G and one step smaller than H.

Do all brands offer GG cups?
No. GG cup sizes are mainly offered by fuller-bust specialist brands that follow an extended UK cup sequence.

Does band size affect GG cup volume?
Yes. A 40GG holds more volume than a 32GG, even though the cup letter is the same.

Related Cup Size Guides

For background on bra sizing systems and cup progression, see the bra sizing reference on Wikipedia .