How Big Are HH Cups? HH Breast Size, Volume & Measurements
HH cups are part of the extended UK bra sizing system and represent a cup size between H and J. Many people searching how big are HH cups want to know the bust difference, cup volume and where this size fits within the UK bra size sequence.
A HH cup is part of the extended UK bra sizing system and sits between H and J in the cup size sequence. It represents roughly a 12 inch difference between the bra band size and the fullest bust measurement.
The typical progression around this size is: GG → H → HH → J.
Many people search to understand how big HH cups are because cup letters alone do not show the full picture. In bra sizing, the band size and cup size work together, which means a 30HH, 34HH and 40HH all have different cup volumes.
If you are unsure of your starting size, you can begin with our Bra Size Calculator and confirm the fit using our Bra Fitting Advice.
How Big Are HH Cups in the UK Cup Size Sequence?
The UK bra sizing system includes several double-letter cup sizes which create smaller steps between cup volumes.
G → GG → H → HH → J → JJ
Each step represents roughly a 1 inch increase in the difference between the bra band size and the fullest bust measurement.
HH is one of the double cup sizes used in the UK bra sizing system. These double letters create additional steps between cup sizes to improve fit accuracy. You can learn more about how this system works in our Double Cup Bra Sizes Explained guide.
You can see the full sequence in our UK Bra Cup Size Chart.
For context, many people researching how big are HH cups also compare this size with neighbouring cups such as H, J and JJ, which represent the next steps in the UK bra sizing progression.
A cup letter does not represent one fixed breast size. For example, a 30HH has a smaller cup volume than a 36HH because cup size increases as the band size increases.
Examples Showing How Big HH Cups Are Across Band Sizes
The bust measurement for an HH cup changes depending on the band size. These examples help explain how big are HH cups across different band measurements and how the same cup letter appears across several sizes.
| Bra Size | Approx Bust Measurement |
|---|---|
| 32HH | 44 inches |
| 34HH | 46 inches |
| 36HH | 48 inches |
| 38HH | 50 inches |
Because cup size changes with band size, an HH cup can appear different depending on the band measurement. For example, a 34HH has a similar cup volume to its sister sizes 32J and 36H. You can learn more about how these equivalent sizes work in our Bra Sister Sizes Explained guide.
How Big Are HH Cups? Estimated Volume and Weight by Band Size
Many people searching how big HH cups are want to understand the approximate breast volume or weight this size represents. Because cup volume increases with band size, the overall breast size of an HH cup varies depending on the band measurement.
The estimates below illustrate how HH cup volume can increase across common band sizes.
| Bra Size | Approx Cup Volume | Approx Weight (Both Breasts) |
|---|---|---|
| 28HH | ~900 cm³ | ~1.6 kg / 3.5 lb |
| 30HH | ~980 cm³ | ~1.7 kg / 3.7 lb |
| 32HH | ~1080 cm³ | ~1.9 kg / 4.2 lb |
| 34HH | ~1180 cm³ | ~2.1 kg / 4.6 lb |
| 36HH | ~1300 cm³ | ~2.3 kg / 5.1 lb |
| 38HH | ~1420 cm³ | ~2.6 kg / 5.7 lb |
| 40HH | ~1560 cm³ | ~2.9 kg / 6.4 lb |
| 42HH | ~1700 cm³ | ~3.2 kg / 7.0 lb |
| 44HH | ~1860 cm³ | ~3.5 kg / 7.7 lb |
| 46HH | ~2020 cm³ | ~3.8 kg / 8.4 lb |
| 48HH | ~2180 cm³ | ~4.1 kg / 9.0 lb |
Looking at these examples helps explain how big are HH cups across different band sizes and why an HH cup on a smaller band will have less overall volume than the same cup letter on a larger band.
If you are shopping for bras in this size, you can explore our guides for 34HH bras, 36HH bras and 38HH bras, which include recommended styles and fit advice for each band size.
What Is a HH Breast Size?
A HH breast size refers to the cup volume created when the difference between the bra band size and the fullest bust measurement is roughly 12 inches in the UK bra sizing system.
Some people searching online may refer to this informally as a HH boob size. In professional bra fitting, however, cup size is determined by the difference between the bra band size and the bust measurement, rather than a fixed breast size.
Because cup size changes with band size, a 30HH, 34HH and 40HH all represent different breast volumes even though the cup letter is the same. This is why bra sizing always combines both the band size and cup size.
Some people also describe this size informally as a HH boob size, but in bra fitting the correct measurement refers to the difference between the band and bust measurements rather than a fixed breast size.
If you are looking for bras in this size, you can explore guides such as best bras for 34HH, best bras for 36HH and best bras for 38HH.
Explore HH Cup Guides
If you are shopping for this size, you can explore our guides covering common HH band sizes and recommended bra styles.
Related Bra Size Guides
What Do HH Cups Look Like?
Many people searching how big are HH cups are trying to visualise the overall breast size this cup represents. Because bra sizing combines the band size and cup size, the appearance of an HH cup can vary significantly depending on the band size.
For example, a 32HH has a noticeably smaller cup volume than a 38HH, even though the cup letter is the same. This happens because cup volume increases with the band size, which is why larger band sizes such as 42HH or 46HH represent much greater overall breast volume.
People often search for terms such as HH breast size, HH cup breasts example or HH boob size when trying to understand how this size compares visually. Looking at band-specific examples such as 34HH, 36HH and 38HH helps illustrate how cup volume increases across band sizes.
Is HH Cup Considered Large?
Many people searching how big are HH cups also ask is HH cup big. An HH cup sits after H and before J in the UK bra sizing sequence and is generally considered part of the extended fuller-bust size range.
Many people asking is HH cup big are trying to understand where this size sits within the overall bra size range. In the UK bra sizing system, cup sizes extend well beyond DD, continuing through E, F, FF, G, GG, H, HH, J and beyond.
Because of this extended sizing system, cup sizes such as F, FF, G and GG are relatively common among fuller-bust bra wearers. An HH cup sits further along this progression and is generally considered part of the extended fuller-bust size range.
However, the overall breast size still depends on the band size. For example, a 30HH will have less total cup volume than a 40HH, even though the cup letter is the same.
If you want to compare nearby cup sizes, you can also see our guides on how big H cups are or how big J cups are.
Example: How Big Is 34HH?
A 34HH typically corresponds to a bust measurement of around 46 inches, based on roughly a 12 inch difference between the band size and the fullest bust measurement in the UK bra sizing system.
This makes 34HH a useful example for people searching terms such as 34HH boob size, 34HH breast size or how big is 34HH. In practice, 34HH has a similar cup volume to its sister sizes 32J and 36H.
If you are shopping for this specific size, you can explore our guide to best bras for 34HH.
HH Cup Size in Inches
In the UK bra sizing system, an HH cup size in inches generally means there is about a 12 inch difference between the band size and the fullest bust measurement.
For example:
- 32HH ≈ 44 inch bust
- 34HH ≈ 46 inch bust
- 36HH ≈ 48 inch bust
- 38HH ≈ 50 inch bust
These measurements help illustrate how big HH cups are and how this cup size compares with nearby cups such as H and J in the UK bra size sequence.
How Big Are HH Cups? Common Questions
Yes. In the UK bra sizing system the sequence progresses H → HH → J, meaning an HH cup is one size larger than H.
A HH cup typically represents about a 12 inch difference between the bra band size and the fullest bust measurement. The actual breast size varies depending on the band size because cup volume increases as band size increases.
HH cups are part of the extended UK bra sizing system and are generally considered a fuller-bust size. However, the overall size still depends on the band measurement.
For additional background on bra cup volume and weight estimates, you may also find this bra size reference on Wikipedia helpful alongside the guides on this site.
Find Your Correct Bra Size
If you are unsure which size to try, measure your bust and band using our Bra Size Calculator.
You can then confirm your fit using our Bra Fitting Advice and compare sizes across brands using the Bra Size Converter.