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 resource so you can finally shop bras internationally without guessing, returning, or losing money.
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
Global Bra Size Converter 2026
Global 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
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Your size in every system
📏 Find Size From Measurements
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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
Brand
Cups Run
Band Run
Best 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 / Region
Band
Cup
Size
What You Need to Know
🇺🇸 United States
34
DD
34DD
Your “home” size — the reference for this table
🇬🇧 United Kingdom
34
E
34E
UK skips straight to E after DD — don’t be alarmed
🇫🇷 France / EU / Germany
90
E
90E
Adds +10 to +15 cm to the band (90–95 most common)
🇮🇹 Italy
3
E
3E
Numeric bands: 1=70, 2=75, 3=80, 4=85, 5=90
🇪🇸 Spain / Portugal
90
E
90E
Same as France / EU
🇦🇺 Australia / New Zealand
12
E
12E
Band = UK band + 8; cups follow UK lettering
🇯🇵 Japan
75
F
75F
Deep, projected cups + narrow wires. Sizes run up
🇰🇷 South Korea
75
F
75F
Almost identical to Japan, sometimes ½ cup tighter
🌐 Mexico
90
E
90E
Follows French / EU system
🇧🇷 Brazil
42
E
42E
42 = EU 90, 44 = EU 95
🛍 Shein (reality)
75
F
75F or 80E
Depends 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 Size
UK
EU / France / Germany
Italy
Japan / Korea
Shein (safe choice)
32C
32C
85C
1C
70D
70C/D
32D
32D
85E
1E
70F
70E
34B
34B
90B
2B
75C
75B
34C
34C
90C
2C
75D
75C/D
34D
34D
90E
2E
75F
75E
34DD
34E
90E/F
2E/F
75F–G
75F or 80E
36C
36C
95C
3C
80D
80C/D
36D
36DD
95E
3E
80F
80E
38DD
38E
100E/F
4E
85G
85F
📌 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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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:
Brand
Cups Run
Band Run
What Real Women Do in 2026
Shein
½–1 cup small
Very stretchy
Size up one full cup. Check item-specific reviews — factory varies wildly
Uniqlo
Deep
Tight
US 34C → 75E. US 34DD → 75G. Narrow wires, snug band
Etam
Shallow
Firm
Exact French conversion works perfectly. Great for average depth
Chantelle / Aubade
Slightly shallow
True
Use exact EU size. Underwire spacing suits average root shapes
H&M
½ cup small
True
Go up one cup from your EU chart size
Intimissimi
Shallow
True
Use the EU number in parentheses shown on the label
Wacoal (Japan)
Very deep
Very tight
US DD → Japanese F or G. Narrow wires. Perfect for projected shapes
Triumph
Average
True
Exact EU size. Works well for average to full root shapes
Marks & Spencer
Deep
True
Exact UK size. Great for full bust and wide-root shapes
Bravissimo / Panache
Very deep
True
Heaven for F+ cups. Exact UK size. Best for full and projected busts
Aimer / Vivien
Deep
Tight
Treat like Japanese brands — size up band and cup vs US sizing
Savage X Fenty
True to US
Stretchy
Order 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 cm
B
B
B
C
15–16 cm
C
C
C
D
17–18 cm
D
D
D
E
19–20 cm
DD
DD
E
F
21–22 cm
DDD
E
F
G
23–24 cm
F
F
G
H
⚡ 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.
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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.
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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
As an Amazon Associate, we earn from qualifying purchases at no extra cost to you.
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