Global Bra Size Conversion Chart
The chart below compares common US, UK, EU, French, Italian, Japanese, and AU/NZ labels. Treat it as a shopping reference: conversion helps you choose the right label, but fit still depends on the brand, style, fabric stretch, and cup shape.
Quick Answer: Why Bra Sizes Change by Country
Most bra sizing systems combine a band label with a cup label, but countries do not label those parts the same way. US and UK bands usually use inch-based numbers, EU and Japanese bands use centimetre-style numbers, French bands are offset from EU bands, AU/NZ bands use dress-size style numbers, and Italian bands use a small numeric scale.
Country-by-Country Bra Sizing Systems
Use this overview to understand what changes before you buy. It is especially useful when a UK retailer sells US brands, a US store stocks UK full-bust brands, or a European product page lists centimetre bands.
| System | Band labels | Cup progression | What to check |
|---|---|---|---|
| US | Inch-based bands such as 30, 32, 34, 36 | Usually A, B, C, D, DD/E, DDD/F, G | Cup letters after D vary by brand, especially between US and UK full-bust labels. |
| UK | Inch-based bands such as 30, 32, 34, 36 | Often D, DD, E, F, FF, G, GG, H | UK E, F, FF, and G should not be read as the same letters in most US charts. |
| EU | Centimetre-style bands such as 65, 70, 75, 80 | Usually A, B, C, D, E, F, G | The band number changes from the inch label, even when cup volume is close. |
| French | Often 80, 85, 90, 95, 100 | Usually A, B, C, D, E, F, G | French bands commonly sit 15 above the EU band for a similar underbust range. |
| AU/NZ | Dress-size style bands such as 8, 10, 12, 14 | Often follows UK-like cup progression in many brands | AU/NZ labels can look unrelated to US/UK bands, so convert before comparing cups. |
| Japan | Centimetre-style bands such as 65, 70, 75, 80 | Often A, B, C, D, E, F, G | Japanese charts may use tighter underbust ranges, so brand charts matter. |
| Italy | Numeric bands such as 1, 2, 3, 4, 5 | Usually A, B, C, D, E, F | Italian band labels are easy to misread if you are used to US or UK numbers. |
Common Bra Size Conversion Examples
These examples show why the same body measurement can appear under very different labels. Use them for orientation, then confirm your exact result with a calculator or the brand's size chart.
| US | UK | EU | French | AU/NZ | Japan | Italy |
|---|---|---|---|---|---|---|
| 32C | 32C | 70C | 85C | 10C | 70C | 2C |
| 34D | 34D | 75D | 90D | 12D | 75D | 3D |
| 36DD/E | 36DD | 80E | 95E | 14DD | 80E | 4E |
| 32G | 32F | 70G | 85G | 10F | 70G | 2G |
How to Use International Bra Size Charts Safely
- Start with current measurements. Recheck underbust and bust if your weight, posture, breast shape, or preferred fit has changed.
- Identify the brand's sizing system. The country of the website is not always the country of the size label.
- Convert the label. Use the chart or conversion tool to move from your known system to the retailer's system.
- Check fit symptoms after conversion. Gaping, spilling, wire pressure, and band ride-up matter more than the label printed on the tag.
US vs UK Bra Sizes
US and UK band labels often look the same, but cup labels can split after D. Many UK brands use D, DD, E, F, FF, G, and GG, while many US brands use D, DD/E, DDD/F, G, H, and I. This is one of the most common international sizing mistakes.
If you are shopping UK full-bust brands from the US, compare the cup sequence instead of matching letters by eye. A UK 32F is commonly closer to a US 32G than a US 32F.
EU, French, Japanese, and Italian Bra Sizes
EU and Japanese labels often use centimetre-style band numbers such as 70, 75, and 80. French labels commonly add 15 to the EU band, so an EU 75 band is often shown as a French 90 band. Italian sizing uses smaller numbers such as 2, 3, and 4, which can look confusing if you expect inch-based bands.
These systems can still describe similar fit ranges. The key is to compare the whole label, not only the cup letter or only the band number.
Expert Fit Notes and Review Methodology
This guide is written for bra shoppers who need practical label translation, not medical advice. It is reviewed for measurement clarity, country-specific sizing differences, common conversion traps, and realistic fit language.
FAQs About Bra Sizing by Country
Are US and UK bra sizes the same?
Bands often look the same, but cup progression can differ after D. Always check whether the brand uses US or UK cup labels.
Is EU bra sizing the same as French bra sizing?
Not exactly. French band labels are commonly 15 higher than EU labels for a similar underbust range, such as EU 75 and French 90.
Can I rely on a conversion chart for every brand?
Use a conversion chart as a starting point. Brand pattern, wire width, cup depth, stretch, and style can still change fit.
What should I do if my converted size feels wrong?
Check whether the band or cup is causing the issue. If cup volume is close but the band feels wrong, use sister sizing. If cups spill or gape, recalculate from measurements.
Next Step: Convert Your Bra Size
If you already know your current size, start with the bra size converter. If you need a fresh measured starting point first, use the bra size calculator and then compare international labels.