Bra Size – International Size Conversion Charts

The wrong cup size can be uncomfortable and unhealthy for the long term. Check this international size chart to ensure you get the perfect fitting bras no matter where you shop from.
Marketing

Marketing

Last updated on February 2, 2023

Whether you’re shopping for a new lingerie set or simply trying to find your ideal fit, the world of bra sizes can be a confusing place. But fear not!

With our comprehensive international size conversion chart, you can now confidently find the right size, no matter where you are in the world. Get ready to say goodbye to uncomfortable underwiring and hello to a perfect, flattering fit.

Bra cup size conversion chart US, UK, Europe, France, Spain, Japan, and Australia

USAUKEuropeFrance/SpainJapanAustralia
AAAAAAAA
ABBBBA
BCCCCB
CDDDDC
DDDEEED
DDEFFFDD
DDD/EFGGGE
FGHHHF
GHIIIG
HIJJJH
IJKKKI
Bra cup size conversion chart US, UK, Europe, France, Spain, Japan, and Australia

When it comes to bra sizing, there are numerous different sizing charts used around the world. So to get the right size, it’s important to not only know the conversions between cup sizes, but also the band size measurements to get the perfect fit. 

  1. Check for conversion charts: Many international stores offer size conversion charts for bras on their websites. Utilize these charts to find the equivalent size in your country.
  2. Consider the brand: Different brands may have different sizing systems, so it’s important to check the specific brand’s size chart before making a purchase.
  3. Try on if possible: If you have the opportunity to try on the bra before purchasing, take advantage of it. The best way to find the right fit is to physically try on the bra.
  4. Pay attention to the fit: When trying on bras, pay attention to the fit around the band and the cups. If there is spillage or gaps, it’s a sign that the bra is not the right size.
  5. Look for adjustable features: Bras with adjustable straps and hooks can help you achieve a customized fit. Consider purchasing bras with these features when shopping from international stores.
  6. Keep track of brands that fit well: Make a note of the brands and styles that fit you well in the past. When shopping from international stores, look for these brands and styles to find a similar fit.

“The best size chart I have seen on Shopify and the impeccable service will not disappoint you!” – Zee Abayas

Selling lingerie online? Try Kiwi Sizing Charts for FREE today.

Bra Band Size Chart with Under Bust Measurements

Under Bust (cm)Under Bust (inch)Europe (EU)USA (US)UK (UK)France (FR), Spain (ES), Belgium (BE)Italy (IT)Australia (AU) & New Zealand (NZ)Japan (JP) & South Korea (KO)
55-60 cm22-24 in5526267000455
60-65 cm24-26 in602828750660
65-70 cm26-28 in653030801865
70-75 cm28-30 in7032328521070
75-80 cm30-32 in7534349031275
80-85 cm32-34 in8036369541480
85-90 cm34-36 in85383810051685
90-95 cm36-38 in90404010561890
95-100 cm38-40 in95424211072095
100-105 cm40-42 in1004444115822100
105-110 cm42-44 in1054646120924105
110-115 cm44-46 in11048481251026110
115-120 cm46-48 in11550501301128115
120-125 cm48-50 in12052521351230120
125-130 cm50-52 in12554541401332125
130-135 cm52-54 in13056561451434130
135-140 cm54-56 in13558581501536135
140-145 cm56-58 in14060601551638140
145-150 cm58-60 in14562621601740145
150-155 cm60-62 in15064641651842150

This app was super useful for setting up size charts for a wide variety of different product types in our store. Our previous app was tag-based, which was not sustainable for our company. Kiwi uses condition-based product matching which is super easy and logical to set up; now we can leave everything be and new products will automatically have size charts with no extra work.

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Bra Band and Bust Size to Cup Size Conversion

This chart will help you determine your bra cup size using the difference between your underbust and bust measurements.

Over-Underbust Difference (CM)USA (US)Europe (EU) & International (Int)UK (UK)France (FR), Spain (ES) & Belgium (BE)Italy (IT)Australia (AU) & New Zealand (NZ)
0-12 cmAAAAAAAAAA
12-14 cmBABAAA
14-16 cmB or CBB or CBBB
16-18 cmCCCCCC
18-20 cmDDDDDD
20-22 cmE/DDEDDEEDD
22-24 cmF/DDDFEFFE
24-26 cmF/DDD or G/DDDDGE or FGGF
26-28 cmG/DDDDHFHHG
28-30 cmHIFFIIH
30-32 cmIJGJJI
32-34 cmJKGGKKJ
34-36 cmJ or KLGG or HLLK
36-38 cmKMHMML
38-40 cmLNHHNNM
40-42 cmMOJOON
42-44 cmNPJJPPO
44-46 cmN or ORJJ or KRRP
46-48 cmOSKSSR
48-50 cmPTKKTTS
Bra Band and Bust Size to Cup Size Conversion

Tips for finding perfect-fitting bras

When shopping for bras, it’s difficult to get the perfect fit if you do not know your measurements well. Here are a few tips to get the right fit.

  1. Measure well. It’s important to get an accurate measurement of your bust size in order to find a bra that fits correctly. Not sure where to go? Most lingerie stores offer a complimentary fitting service.
  2. Pay attention to the band. The band is the most important part of the bra, so make sure it fits snugly but comfortably. If it’s too loose, it won’t provide the necessary support.
  3. Look for bras with adjustable straps. Adjustable straps are great for getting the perfect fit. They also provide more support and make it easier to find the right size.
  4. Make sure the center panel lies flat. The center panel of the bra should always lie flat against your chest. If it’s not, it’s likely the wrong size.
  5. Check the cup size. The cup size of the bra should fit your bust comfortably. If it’s too small or too large, it won’t be supportive or comfortable.
  6. Test the fabric. The fabric of the bra should be soft and comfortable against the skin. If it’s too rough or too stretchy, it won’t provide the right support.
  7. Try it on. It’s always important to try on the bra before buying it to make sure it fits and feels right. Don’t be afraid to ask for help if you need it.

How to use the bra size conversion charts?

Using the above bra size conversion chart is easy. For example, if you’re on an online store that shows EU sizes follow the steps below:

  • First, check the US cup size of the bra you already have and are comfortable in.
  • Use the above chart to find the cup size under the US column.
  • Find the EU cup size in the same row under the Europe column. 

This will help you choose the right size for your bra when shopping at international lingerie stores. 

How to measure yourself for the perfect fitting bra?

Great, let’s now see how to find the perfect bra size. There are two measurements you’ll need to take: bust and under-bust. These two measurements will help determine your band size and cup size, respectively.

Bra measurement guide - first measure the under bust and then the fullest part of the bust to get a perfect fitting bra.
Bra measurement guide

Here’s a step-by-step guide to finding your American bra size:

  1. Under-bust measurement: Measure the circumference of your ribcage, just under your bust. Round this measurement to the nearest whole number. For example, if you get a measurement of 33.5 inches, round it up to 34 inches.
  2. Band size: Measure the under-bust measurement and round up to a whole integer. After rounding, if it’s even, add 4 inches. If it’s odd, add 5 inches to get the US band size. For example, if the measured under-bust is 29 inches, your band size is 34.
  3. Bust measurement: Measure the fullest part of your bust and round to the nearest whole number.
  4. Cup size: Measure the bust size and round to the whole number. Then calculate the difference between bust and band size then check the following list. 
Bust – Band size – Difference (in inches)Cup size
0 – 1/2″AA
1/2 – 1″A
1 – 2″
2 – 3″C
3 – 4″D
4 – 5″E (DD)
5 – 6.5″F (DDD)
6.5 – 8″G
8 – 9.5″H
9.5 – 11″I
11 – 13″J
13 – 15″K

So, if your band size is 31 inches and your bust is 34 inches, the difference is 3 inches, which means your cup size is C.

Remember, some brands use the difference between bust and under-bust measurements instead of bust and band size, so it’s always best to check the specific brand’s size chart before purchasing.

FAQs for bra size conversion

Finding it difficult to get the right fitting bra? Here are some of the frequently asked questions related to bra sizing that will help you get a hang of these sizes.

What is my bra size if my band size (underbust) is 22 inches and the bust-under-bust difference is 1 inch?

For a 22-inch band size and a 1-inch difference in the underbust and bust, a US 26A bra will fit you well.

What is my bra size if my underbust is 26 inches and the bust-underbust difference is 3 inches?

For a 26-inch band size and a 3-inch difference in the underbust and bust, a US 28C bra will fit you well.

What is my bra size if my underbust is 28 inches and the bust-underbust difference is 3 inches?

For a 28-inch band size and a 3-inch difference in the underbust and bust, a US 30C bra will fit you well.

What is my bra size if my underbust is 32 inches and the bust-underbust difference is 4 inches?

For a 32-inch band size and a 4-inch difference in the underbust and bust, a US 34D bra will fit you well.

What is my bra size if my underbust is 36 inches and the bust-underbust difference is 5 inches?

For a 36-inch band size and a 5-inch difference in the underbust and bust, a US 38E (DD) bra will fit you well.

What is my bra size if my underbust is 38 inches and the bust-underbust difference is 6.5 inches?

For a 38-inch band size and a 6.5-inch difference in the underbust and bust, a US 40F (DDD) bra will fit you well.

What is my bra size if my underbust is 40 inches and the bust-underbust difference is 8 inches?

For a 40-inch band size and an 8-inch difference in the underbust and bust, a US 42G bra will fit you well.

What is my bra size if my underbust is 42 inches and the bust-underbust difference is 9.5 inches?

For a 42-inch band size and a 9.5-inch difference in the underbust and bust, a US 44H bra will fit you well.

What is my bra size if my underbust is 44 inches and the bust-underbust difference is 11 inches?

For a 44-inch band size and an 11-inch difference in the underbust and bust, a US 46I bra will fit you well.

What is my bra size if my underbust is 46 inches and the bust-underbust difference is 13 inches?

For a 46-inch band size and a 13-inch difference in the underbust and bust, a US 48J bra will fit you well.

What is my bra size if my underbust is 46 inches and the bust-underbust difference is 9 inches?

For a 46-inch band size and a 9-inch difference in the underbust and bust, a US 48H bra will fit you well.

What cup size is a 2-inch difference?

A 2-inch difference corresponds to B cup size.

What cup size is a 1-inch difference?

A 1-inch difference corresponds to A cup size.

What cup size is a 3-inch difference?

A 3-inch difference corresponds to C cup size.

What cup size is a 4-inch difference?

A 4-inch difference corresponds to D cup size.

What cup size is a 5-inch difference?

A 5-inch difference corresponds to the DD or E cup size.

What cup size is a 6-inch difference?

A 6-inch difference corresponds to the DDD or F cup size.

What cup size is a 7-inch difference?

A 7-inch difference corresponds to G cup size.

What cup size is an 8-inch difference?

An 8-inch difference corresponds to a G cup size.

What cup size is a 9-inch difference?

A 9-inch difference corresponds to H cup size.

What cup size is a 10-inch difference?

A 10-inch difference corresponds to the I cup size.

What cup size is an 11-inch difference?

An 11-inch difference corresponds to the I cup size.

What cup size is a 12-inch difference?

A 12-inch difference corresponds to J cup size.

Still using images for size charts?

A majority of your shoppers are on their mobile phones. Image size charts are an inconvenient way to find the right size for their bra and lingerie selections. And using images for size charts also does not comply with ADA.

Instead, you need an interactive way to display size charts for your customers to find proper sizes and thus reduce your store’s returns

Kiwi’s sizing charts help you create interactive size charts that make it seamless for customers to find the size they’re looking for. And with the AI size recommender, customers don’t even need to check the sizing charts—just answer a few questions about their body type and the size recommender will give the best size for them. 

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Now ensure that your customers receive the perfect-sized bras the first time, reducing returns and increasing customer satisfaction. Upgrade your store’s size chart today and see the difference for yourself.

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