International Sizing Guide  ·  2026 Edition

International Bra Size Converter:
US, UK, EU, Japan,
Korea & More

One body. A dozen different labels. This is the only guide you’ll need to convert your bra size — US to EU, UK to EU, Japan to US — and shop anywhere in the world with the right size every time.

✦ Updated 2026 ✦ 11 countries covered ✦ 12+ brands decoded ✦ Free interactive tool below

If you’ve ever Googled “bra size converter US to UK”, “Japan bra size conversion”, or “EU vs UK bra sizes” — you already know how chaotic international sizing can be. This 2026 guide brings every major country and brand into one accurate, updated bra size conversion resource so you can finally shop bras internationally without guessing, returning, or losing money.

⚡ Quick Answer

To convert your bra size internationally: EU band = US/UK band + 56–60 (a US 34 is roughly an EU 90), UK cups skip straight from DD to E (so a US 34DD is a UK 34E), and Japanese and Korean cup letters run about two to three letters higher than US sizing (a US DD is commonly a Japanese F or G cup — that’s completely normal, not a sizing error). For an exact match rather than an approximation, use the bra size converter tool below or check the international bra size chart and most-searched conversions further down this page.

You finally find the cutest bra on Shein. Or Uniqlo drops a new wireless one everyone’s raving about. You click “34DD” because that’s your size…

…and two weeks later you’re wrestling with something that fits like a kid’s training bra.

It’s not you. It’s the sizing systems. They’re all speaking different languages, but your body only speaks one. This guide — updated for every country people actually shop from — ends the confusion forever.

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Interactive Tool · Use It Now
International Bra Size Converter 2026
International Bra Size Converter  ·  2026 Edition

Find Your Size,
Anywhere in the World

Convert your bra size between US, UK, EU, Japan, Korea, Australia and 50+ brands — instantly, accurately.

🌍 International Size Converter
✦
Your size in every system
📏 Find Size From Measurements
✦
Your size across all systems
How to measure: Wrap tape snugly around your ribcage just under your bust (exhale first). For bust, wrap loosely across the fullest point. Always measure without a bra or in a thin, unpadded one.
🏷️ Brand-by-Brand Fit Guide 2026
BrandCups RunBand RunBest Strategy
Key: “Runs small” means size up. “True” means your normal conversion works perfectly. Always read the last 20 reviews mentioning “runs small,” “deep cups,” or “narrow wires” before ordering.
📋 Quick-Reference Cheat Sheet

Click any size card to copy it. Screenshot this page and save it for shopping anywhere.

Remember: EU “E” cup ≠ UK “E” cup — EU E is usually UK F or FF. Japan F/G for a US DD is totally normal!
When in doubt, choose the bigger cup — you can tighten a band with an extender, you can’t add cup volume.
Copied to clipboard!
💡 How to use the tool above: Select your current country & size in the Size Converter tab for instant results — or enter your underbust & bust measurements in the From Measurements tab if you’re not sure of your size yet.
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One Body, Dozen Different Labels

To understand why international sizing is so confusing, look at this real-world example. A person with an underbust of 74 cm and bust of 96 cm is the exact same body everywhere on earth — but here’s what the label says depending on where they shop:

📐 Real Example: 74 cm underbust · 96 cm bust
🇺🇸 US
34DD
Your “home” size
🇬🇧 UK
34E
UK skips DD→E
🇫🇷 EU / France
90E
Band +10–15 rule
🇮🇹 Italy
3E
Numeric band: 3=80
🇯🇵 Japan
75F
Deep projected cups
🇰🇷 Korea
75F
Nearly same as Japan
🇦🇺 Australia
12E
Band = UK+8
🇧🇷 Brazil
42E
42 ≈ EU 90
The takeaway: Every label above describes the same woman, the same bra. That’s why ordering international bras without a converter is basically a coin toss.
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🌍 International Bra Size Chart 2026

This table uses US 34DD as the reference point — the same body from the example above — to show you exactly what each country’s label says and the key rule you need to know for each system:

Country / RegionBandCupSizeWhat You Need to Know
🇺🇸 United States34DD34DDYour “home” size — the reference for this table
🇬🇧 United Kingdom34E34EUK skips straight to E after DD — don’t be alarmed
🇫🇷 France / EU / Germany90E90EAdds +10 to +15 cm to the band (90–95 most common)
🇮🇹 Italy3E3ENumeric bands: 1=70, 2=75, 3=80, 4=85, 5=90
🇪🇸 Spain / Portugal90E90ESame as France / EU
🇦🇺 Australia / New Zealand12E12EBand = UK band + 8; cups follow UK lettering
🇯🇵 Japan75F75FDeep, projected cups + narrow wires. Sizes run up
🇰🇷 South Korea75F75FAlmost identical to Japan, sometimes ½ cup tighter
🌐 Mexico90E90EFollows French / EU system
🇧🇷 Brazil42E42E42 = EU 90, 44 = EU 95
🛍 Shein (reality)75F75F or 80EDepends on the factory — always check reviews!
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The 2026 Cheat Sheet: If You’re This in US → Choose This

Screenshot this. These are the nine most-searched sizes — exact conversions from the blog, straight from real sizing data, no estimations:

📋 Quick-Reference — Most Searched Sizes 2026
US SizeUKEU / France / GermanyItalyJapan / KoreaShein (safe choice)
32C32C85C1C70D70C/D
32D32D85E1E70F70E
34B34B90B2B75C75B
34C34C90C2C75D75C/D
34D34D90E2E75F75E
34DD34E90E/F2E/F75F–G75F or 80E
36C36C95C3C80D80C/D
36D36DD95E3E80F80E
38DD38E100E/F4E85G85F
📌 Use the interactive tool above to get conversions for any size not listed in this cheat sheet — including 28, 30, 40, and 42 bands plus sizes up to K cup.
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Most-Searched Bra Size Conversions, Answered Directly

These are the individual EU-to-US/UK conversions people look up most. Each row below is the exact match — no rounding, no approximation:

EU SizeUS SizeUK SizeJapan / Korea
EU 75BUS 28CUK 28C60D
EU 75CUS 28DUK 28D60E
EU 80CUS 30DUK 30D65E
EU 85BUS 32CUK 32C70D
EU 85CUS 32DUK 32D70E
EU 85EUS 32DDDUK 32F70G
EU 90CUS 34CUK 34C75D
EU 95CUS 36CUK 36C80D

And the reverse direction — US size to UK, EU, and Japan:

US SizeUK SizeEU SizeJapan / Korea
US 34BUK 34BEU 90B75C
US 34CUK 34CEU 90C75D
US 36CUK 36CEU 95C80D
US 36DUK 36DEU 95D80E
US 34DDUK 34EEU 90E75F
Not seeing your exact size? The interactive converter at the top of this page covers every band from 28 to 42 and every cup from A to G — including sizes not listed in the quick tables above.
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Japanese Bra Size Chart, Explained

Japanese and Korean bra sizing confuses more shoppers than any other system, mainly because the cup letters climb faster than in US or UK sizing. Seeing a Japanese “G cup” recommended for your US DD size is not a mistake — it’s just a different scale describing the exact same volume.

The band number shifts too: a US/UK 34 band is roughly a Japanese 75 band, a US 32 is roughly a Japanese 70, and a US 36 is roughly a Japanese 80. Combined with the faster-climbing cup letters, this is why a US 34DD reliably converts to a Japanese 75F, and sometimes 75G depending on the brand.

US CupJapanese / Korean CupNotes
CDOne letter higher
DEOne letter higher
DD / EFMost-searched conversion
DDD / FGTwo letters higher
GH or ITwo to three letters higher

Brands like Wacoal and Uniqlo also run narrow, snug wires alongside the deeper cup labeling — so when shopping Japanese brands, it’s worth reading the Brand Guide tab in the tool above before ordering your first size.

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Quick-Reference Lines Everyone Saves

These are the four most-searched conversion paths. Screenshot, save, share in your group chat:

US 34DD → UK 34E → EU 90E/F → Japan/Korea 75F (sometimes G) → Shein 75F or 80E
US 32D → UK 32D → EU 85E → Japan/Korea 70F → Shein 70E
US 36C → UK 36C → EU 95C → Japan/Korea 80D → Shein 80C/D
US 38DD → UK 38E → EU 100E/F → Japan/Korea 85G → Shein 85F
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Brand-by-Brand Truth Table (2026 Edition)

International size charts only get you halfway there. Every brand interprets sizing differently — cups that run shallow or deep, bands that run tight or stretchy. Here’s what real women actually do when ordering from each brand:

BrandCups RunBand RunWhat Real Women Do in 2026
Shein½–1 cup smallVery stretchySize up one full cup. Check item-specific reviews — factory varies wildly
UniqloDeepTightUS 34C → 75E. US 34DD → 75G. Narrow wires, snug band
EtamShallowFirmExact French conversion works perfectly. Great for average depth
Chantelle / AubadeSlightly shallowTrueUse exact EU size. Underwire spacing suits average root shapes
H&M½ cup smallTrueGo up one cup from your EU chart size
IntimissimiShallowTrueUse the EU number in parentheses shown on the label
Wacoal (Japan)Very deepVery tightUS DD → Japanese F or G. Narrow wires. Perfect for projected shapes
TriumphAverageTrueExact EU size. Works well for average to full root shapes
Marks & SpencerDeepTrueExact UK size. Great for full bust and wide-root shapes
Bravissimo / PanacheVery deepTrueHeaven for F+ cups. Exact UK size. Best for full and projected busts
Aimer / VivienDeepTightTreat like Japanese brands — size up band and cup vs US sizing
Savage X FentyTrue to USStretchyOrder your normal US size. Inclusive sizing across 32–46 bands
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How to Measure Yourself in 3 Minutes

Don’t know your size at all? No problem. Grab a soft measuring tape and follow these two steps. All you need is three minutes and a mirror:

1
Underbust (band size)
Exhale, pull the tape snug — firm, but not cruel. Wrap it directly under your bust around the ribcage. Round to the nearest even number in inches.
2
Bust (cup size)
Stand straight with no bra — or a thin, unpadded one. Tape goes loosely across the fullest part of your chest. Do not compress.

Difference = Your Cup Size

Subtract your underbust from your bust (both in cm). Find your difference below:

Difference (cm)🇺🇸 US Cup🇬🇧 UK Cup🇫🇷 EU Cup🇯🇵🇰🇷 Japan / Korea
13–14 cmBBBC
15–16 cmCCCD
17–18 cmDDDE
19–20 cmDDDDEF
21–22 cmDDDEFG
23–24 cmFFGH
⚡ Faster way: Enter your underbust and bust directly into the From Measurements tab of the converter tool above — it handles all the cup math and gives you every country’s size instantly.
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The 5 Mistakes That Ruin 90% of International Orders

Most international sizing disasters come from the same five traps. Know these before you click “buy”:

1
Treating EU “E” as UK “E”
They are not the same. EU E = UK F or FF in most cases. Always use a proper conversion chart, not cup-letter logic.
2
Ordering Shein in “US” sizing
Shein doesn’t use US sizing — ever. Use Japanese-style sizing (75F, 80E) and always check the item’s review section.
3
Forgetting the France +10–15 Rule
France and EU add 10–15 cm to the band number. A US 34 band becomes EU 90. Not knowing this leads to a band two sizes off.
4
Panicking at Japanese F or G
If Japan labels you a G cup, breathe. For a US DD, that’s completely normal. Japan’s cup alphabet starts earlier, so letters run higher.
5
Ignoring Your Breast Shape
A projected shape in a shallow Etam bra will cry. A shallow shape in a deep Wacoal will swim. Cup depth matters as much as cup letter.
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When in doubt, choose the bigger cup. You can tighten a band with an extender — you can never add cup volume.
✦ The Golden Rule of International Bra Shopping

Final Pro Tips From Someone Who’s Returned Way Too Many Bras

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Read the last 20 reviews Filter reviews mentioning “runs small,” “deep cups,” or “narrow wires.” Those three phrases will save you from 90% of bad fits.
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Shop return-friendly first Try Shein, ASOS, Zalando, Amazon Prime Wardrobe, and Next before committing to no-return boutiques. Test the fit, then buy more.
⬆️
Always choose the bigger cup A band extender costs £2. Getting more cup volume back after you’ve ordered? Impossible. Go up when in doubt.
🔖
Bookmark this page Sizing charts shift every season as brands update their factories. This guide is updated for 2026 — come back before any big haul.
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Editor’s Top Picks for Large Busts

If you’re shopping for high-support or everyday comfort and your size is on the larger end, these two stand out consistently in 2026:

Top Pick · Max Support
SHEFIT Ultimate Sports Bra — High Support, Fully Adjustable
Best for high bounce control, training days, heavy busts that need a locked-in band
Adjustable straps + underband, high neckline coverage, stable wide base
Trade-off: more structured feel than lounge crops
View on Amazon →
Top Pick · Everyday Comfort
Evelyn & Bobbie Beyond Bra — Wireless, Smooth, All-Day Wear
Best for desk days, travel, errands, sensitive skin, wire fatigue
Seamless knit, wide straps, full coverage cups, breathable structure
Trade-off: not designed for high-impact workouts
View on Amazon →

As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.

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Bra Size Conversion FAQs

How do I convert my bra size from EU to US?

Subtract roughly 56–60 from the EU band number to get the US band, and shift the cup letter one step down — EU cups run about one letter larger than US cups at the same volume. EU 90C converts to US 34C; EU 85B converts to US 32C. Use the converter tool at the top of this page for an exact match on any size.

How do I convert a UK bra size to EU?

Add 56–60 to the UK band number, and move the cup letter up by roughly one step. A UK 34E converts to EU 90E/F, and a UK 32C converts to EU 85C–85D. Brand-specific fit can shift this by half a cup — check the Brand Guide tab above for specific labels.

What is 80C in US or UK bra size?

An EU 80C converts to a US 30D and a UK 30D. EU band 80 corresponds to a US/UK band of roughly 30, and the EU cup letter C sits one step below the equivalent US/UK cup for the same volume.

What is 85B in US bra size?

An EU 85B converts to a US 32C and a UK 32C. EU band 85 corresponds to US/UK band 32, and the EU B cup at that band matches a US/UK C cup in actual volume.

What is 90C in US bra size?

An EU 90C converts to a US 34C and a UK 34C — at band 90/34 the EU and US/UK cup letters happen to align, which isn’t the case at every band size.

What is 34DD in European bra size?

A US 34DD converts to a UK 34E and a European size of 90E, sometimes labeled 90E/F depending on the brand. This is the single most-searched bra size conversion, since UK sizing skips straight from DD to E while EU sizing uses a slightly different cup progression at the same band.

Why do Japanese bra sizes seem so much bigger, like a G cup instead of DD?

Japanese and Korean sizing uses a cup alphabet that climbs faster than US sizing. A US DD cup is commonly labeled an F or G cup in Japan for the exact same breast volume — it isn’t a larger size, just a different labeling convention. The band number shifts too: a US 34 band is roughly a Japanese 75 band.

Is Shein bra sizing accurate to US, UK, or EU charts?

Shein doesn’t use US, UK, or EU sizing directly — its labels are closer to Japanese-style sizing (75F or 80E for a US 34DD), and fit varies between factories for the same listed size. Size up one full cup from your usual size and check item-specific reviews for “runs small” or “narrow wires” before ordering.

How does Uniqlo bra sizing compare to US sizing?

Uniqlo uses Japanese sizing with notably deep cups and a tighter band feel than US sizing suggests. A US 34C is commonly a Uniqlo 75E, and a US 34DD is commonly a Uniqlo 75G. Because cups run deep and bands run snug, many shoppers size the band up slightly from the direct chart conversion.

What is the difference between UK and EU cup sizes?

UK and EU cup letters aren’t interchangeable even when they look identical — an EU “E” cup is typically equivalent to a UK “F” or “FF” cup for the same volume, because the two systems assign letters to volume differently as sizes increase. Always use a band-and-cup conversion chart rather than assuming the letter carries over directly.

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