Easy Guide to Japanese Bra Sizes!
Finding a comfy bra is important! Sometimes, bra sizes from different countries are confusing. Japanese bra sizes (日本のブラサイズ – Nihon no bura saizu) are special and different from sizes in the US or UK.
If you buy Japanese lingerie, knowing your size helps a lot. It stops you from getting a bra that feels bad or doesn’t fit right. This guide makes finding your 日本のブラサイズ easy!
Japanese bras use centimeters (cm) for measuring. They have a number for the band around your body and a letter for the cup part. Measuring yourself the right way helps you find your perfect Japanese bra size.
Use our simple Japanese Bra Size Calculator below to find your size!
🇯🇵 Japanese Bra Size Calculator
Enter your measurements in centimeters to find your Japanese bra size.
🎯 Your Japanese Bra Size
How to Measure for Your Japanese Bra Size
Finding your Japanese bra size (日本のブラサイズ) is easy if you measure right! You need a soft measuring tape and use centimeters (cm). It’s like measuring for clothes, which you can learn more about here.
- Measure Your Underbust (アンダーバスト – Andābasuto): Take off your bra or wear one with no padding. Breathe out. Wrap the tape measure around your body, right under your boobs where the bra band sits. Keep the tape flat and straight.
Write down this number in cm. This helps find your Japanese band size. - Measure Your Bust (トップバスト – Toppubasuto): Now, wrap the tape around the biggest part of your boobs. Don’t pull the tape too tight! Keep it level with the floor.
Write this number down in cm too. - Put Numbers in Calculator: Type your underbust number (Andābasuto) and your bust number (Toppubasuto) in cm into the calculator above.
- Find Your Size: Click the button! The calculator will show your suggested Japanese bra size (日本のブラサイズ).
Easy Tip: Measure in front of a mirror to keep the tape straight. Or, ask someone you trust to help measure your bra size in cm.
How Japanese Bra Sizes Work
Japanese bra sizing (日本のブラサイズ) is different but simple once you know how! It uses centimeters (cm). The size looks like a number then a letter (like 70B or 75C).
- Band Size: The number (like 65, 70, 75) is your underbust (Andābasuto) measurement in cm. Japanese bands usually go up in steps of 5 cm. Pick the band size closest to your measurement.
- Cup Size: The letter (A, B, C, D, E, F) shows how much bigger your bust (Toppubasuto) is than your underbust (Andābasuto) in cm. Bigger difference means a bigger letter! Japan usually goes straight from D to E, not using DD like some places.
- About 10 cm bigger = A cup
- About 12.5 cm bigger = B cup
- About 15 cm bigger = C cup
- About 17.5 cm bigger = D cup
- About 20 cm bigger = E cup
- About 22.5 cm bigger = F cup
(These are just guides, it can change a bit!)
Also, Japanese bras might feel different. They are often made for smaller body shapes. They might have more padding too.
What Your Japanese Bra Size Means
Your calculated Japanese bra size (日本のブラサイズ), like 75C, might look different from your US or UK size. That’s okay! It’s because Japan measures differently. You can compare with our US Bra Size Calculator or UK Bra size Calculator.
Our bodies change, so it’s good to measure again sometimes (like once a year). If you’re between sizes, you can try sister sizes. This means if 75C is a bit loose in the band, try 70D (smaller band, bigger cup). If 75C is tight, try 80B (bigger band, smaller cup). Our Sister Size Finder can help!
Fixing Common Bra Problems
Getting the right Japanese bra size helps fix annoying problems!
- Band Goes Up Your Back? Your band is too big! Try a smaller band number, maybe with a bigger cup letter (like go from 75B to 70C).
- Straps Hurt or Fall Down? Make sure your band fits snugly first – it does most of the work! If straps still fall, look for bras with straps closer together.
- Boobs Spilling Out? You need a bigger cup size! Make sure the whole boob fits inside the cup.
- Gaps in the Cup? The cup might be too big, or the shape is wrong for you. Try a smaller cup letter or a different style of bra.
- Wire Pokes You? The wire should sit flat on your chest between your boobs. If it hurts or pokes, the size or style isn’t right.
Changing US/UK Sizes to Japanese
Changing your US or UK size straight to a Japanese bra size (日本のブラサイズ) doesn’t always work well. Japan measures in cm and makes bras differently. Using charts can give you an idea, but measuring is best!
Think about body size charts like the ones from the Craft Yarn Council. They show how measurements relate. But always measure yourself in cm for Japan!
| Underbust (cm) | Approx. Japanese Band | Approx. US/UK Band |
|---|---|---|
| 63-67 cm | 65 | 30 |
| 68-72 cm | 70 | 32 |
| 73-77 cm | 75 | 34 |
| 78-82 cm | 80 | 36 |
| 83-87 cm | 85 | 38 |
| 88-92 cm | 90 | 40 |
Cup sizes are harder to guess. Japanese cup sizes might seem bigger (like E instead of D) because of cm measuring and padding. Some people say go up a cup size or two from your US size, but it depends!
Most Important: Measure yourself in cm! Use the Japanese bra size calculator. That’s the best way. Our Bra Size Converter can also help compare sizes from different places.
Tips for Buying Japanese Bras
Shopping for Japanese lingerie? Here are some easy tips!
- Use Your CM Numbers: Always shop using your underbust (Andābasuto) and bust (Toppubasuto) size in centimeters.
- Check Brand Charts: Different brands might fit slightly differently. Look for size charts from that specific brand if you can.
- Think About Padding: Many Japanese bras have padding. This can make the cup feel smaller, so you might need a bigger cup letter.
- Read What Others Say: Look for reviews online from people who bought the bra.
- Know the Return Rules: If buying online, check if you can return or swap the bra if it doesn’t fit perfectly.