Complete UK Bra Size Guide | International Band & Cup Conversion Charts
This complete UK Bra Size Guide explains how UK band and cup sizing works and provides reference charts for comparing UK sizes with European, French, Australian, US, Canadian and Japanese sizing systems.
This UK Bra Size Guide explains why every bra size combines a band size with a cup letter, so the cup letter cannot be considered on its own. For example, a 30F and a 40F have different cup volumes because cup capacity increases as the band size increases.
After using this UK Bra Size Guide, start by entering your underband and bust measurements into our Bra Size Calculator. Review the main band, cup, strap and underwire checks in our Bra Fitting Advice, then use the Bra Size Converter when comparing equivalent cup labels between participating UK lingerie brands.
The Lingerie Advisor covers the complete currently manufactured UK bra-size range across bands 28–56 and cups AA–LL. Individual band-and-cup combinations vary according to current product availability.
Understanding the UK Bra Size Guide
Every UK bra size combines two measurements: a band size and a cup size. The band size is calculated from your underbust measurement, while the cup size is determined by the difference between your underbust and fullest bust measurements.
Because cup size is calculated in relation to the band size, the same cup letter does not always represent the same cup volume. For example, a 30F has a smaller cup volume than a 40F, even though both bras use the letter F.
If you're unsure of your starting size, use our Bra Size Calculator before comparing international sizes. Once you know your UK size, use the conversion charts below as a reference when shopping with overseas retailers or comparing international size labels.
International bra sizes are not completely standardised between manufacturers. Always use conversion charts as a guide and check the individual brand's size information where available.
UK Bra Size Guide Conversion Charts
These reference charts compare UK bra sizes with the equivalent band and cup labels used in Europe, France, Australia, New Zealand, the USA, Canada and Japan. They provide a useful starting point when shopping internationally or comparing labels from different sizing systems.
International bra sizing is not completely standardised between manufacturers, so always check the individual brand's own size information where available. To compare equivalent cup labels between participating UK lingerie brands, use our Bra Size Converter.
The conversion charts below form the core of this UK Bra Size Guide, helping you compare standard UK band and cup sizes with international sizing systems.
UK Bra Size Guide – Band Size Conversion Chart
UK band sizes increase in two-inch increments. The table below covers UK bands 28–56 and shows their standard international equivalents.
| UK | Europe | France | AUS/NZ | USA/CAN | Japan |
|---|---|---|---|---|---|
| 28 | 60 | 75 | 6 | 28 | 60 |
| 30 | 65 | 80 | 8 | 30 | 65 |
| 32 | 70 | 85 | 10 | 32 | 70 |
| 34 | 75 | 90 | 12 | 34 | 75 |
| 36 | 80 | 95 | 14 | 36 | 80 |
| 38 | 85 | 100 | 16 | 38 | 85 |
| 40 | 90 | 105 | 18 | 40 | 90 |
| 42 | 95 | 110 | 20 | 42 | 95 |
| 44 | 100 | 115 | 22 | 44 | 100 |
| 46 | 105 | 120 | 24 | 46 | 105 |
| 48 | 110 | 125 | 26 | 48 | 110 |
| 50 | 115 | 130 | 28 | 50 | 115 |
| 52 | 120 | 135 | 30 | 52 | 120 |
| 54 | 125 | 140 | 32 | 54 | 125 |
| 56 | 130 | 145 | 34 | 56 | 130 |
UK Bra Size Guide – Cup Size Conversion Chart
Cup-size lettering varies more than band sizing between countries. The table below covers the complete UK cup sequence from AA to LL and shows the nearest standard international equivalents.
| UK | Europe | France | AUS/NZ | USA/CAN | Japan |
|---|---|---|---|---|---|
| AA | AA | AA | AA | AA | A |
| A | A | A | A | A | B |
| B | B | B | B | B | C |
| C | C | C | C | C | D |
| D | D | D | D | D | E |
| DD | E | E | DD | DD/E | F |
| E | F | F | E | DDD/F | G |
| F | G | G | F | G | H |
| FF | H | H | FF | H | I |
| G | I | I | G | I | J |
| GG | J | J | GG | J | K |
| H | K | K | H | K | L |
| HH | L | L | HH | L | M |
| J | M | M | J | M | N |
| JJ | N | N | JJ | N | O |
| K | O | O | K | O | P |
| KK | P | P | KK | P | Q |
| L | Q | Q | L | Q | R |
| LL | R | R | LL | R | S |
These charts provide standard UK to international size conversions. Individual lingerie brands may use slightly different size ranges or sizing conventions, particularly at the largest cup sizes. For UK brand-specific size charts, conversion tables and links to official brand websites, browse our Bra Brand Size Guides. For additional manufacturer sizing information, you can also refer to the Official Elomi Website.
UK Bra Size Visual and Buying Resources
Use these guides and interactive tools to explore complete UK bra sizes, compare band-and-cup combinations and find buying guides for sizes that are currently manufactured.
Bra Size Visual Comparison Tool
Select and compare illustrated UK bra sizes side by side to see how changes in band size and cup letter affect overall cup volume.
Compare UK Bra Sizes AA–LL Cup SequenceUK Bra Cup Size Guide
Explore the complete UK cup-size sequence from AA to LL and learn how cup letters progress within the UK sizing system.
View the Cup Size Guide MeasurementsUK Bra Cup Size Chart
Compare UK cup letters in order and see how the measurement difference between the underband and fullest bust relates to cup size.
View the Cup Size Chart Buying Guide DirectoryBest Bras by Size
Browse the full matrix of currently manufactured UK bra sizes and open published buying guides for individual band-and-cup combinations.
Browse Bras by Exact Size Browse by CupBest Bras by Cup Size
Explore UK cup sizes across their available band ranges and find links to published size-specific bra buying guides.
Browse Bras by Cup Size Brand InformationBra Brand Size Guides
View brand-specific UK size ranges, international conversion charts and official sizing information for leading lingerie brands.
Browse Brand Size GuidesUK Bra Size Calculator, Brand Converter and Fitting Advice
Use these tools alongside the conversion charts to calculate your UK starting size, compare sizing between participating UK brands and review the main signs of a correctly fitting bra.
Bra Size Calculator
Enter your underband and fullest-bust measurements to calculate a recommended UK band-and-cup size.
Calculate Your UK Bra SizeBra Size Converter
Compare equivalent cup labels between participating UK lingerie brands, including Freya, Elomi, Panache, Fantasie and others.
Compare UK Brand SizesBra Fitting Advice
Review how the band, cups, centre gore, straps and underwires should sit when checking the fit of a bra.
Read Bra Fitting AdviceMeasure first with the Bra Size Calculator, check the result using our Bra Fitting Advice, then use the international charts above or the Bra Size Converter depending on whether you are comparing countries or UK brands.
These frequently asked questions expand on the information covered throughout this UK Bra Size Guide.
UK Bra Size Guide FAQs
How do I find my UK bra size?
Measure your underband and fullest bust, then enter the measurements into our Bra Size Calculator. The result provides a recommended UK bra size, which you can then use with the conversion charts above.
Are UK bra sizes the same as European sizes?
No. UK band sizes and cup lettering differ from European sizing. The conversion tables above provide standard reference conversions, although individual manufacturers may vary slightly.
Does the same cup letter always have the same cup volume?
No. Cup volume changes with the band size. For example, a 30F has a smaller cup volume than a 40F, even though both bras use the letter F. This is why every bra size should be considered as a complete band-and-cup combination.
Can I use these charts for every lingerie brand?
The charts provide standard international conversions, but some brands use slightly different sizing systems or offer a smaller size range. Always check the manufacturer's own size information alongside these reference charts.
Where can I compare UK bra sizes visually?
Our Bra Size Visual Comparison Tool allows you to compare illustrated UK bra sizes side by side. You can also explore our Bra Cup Size Guide and Best Bras by Size directory.
This UK Bra Size Guide is the ideal starting point before exploring our specialist bra size guides, visual comparison tools and buying guides.