Bra Size Charts and Conversions

Bra Size Charts and Conversions - Accurate Guide with Images
Image: International bra size charts and conversions.

International Bra Size Conventions

Several bra sizing conventions are used across the world, also referred to as "size charts" or "size tables". The conventions are named after their area of origin and almost always as an abbreviation (shown in parenthesis): American (US), British (UK), European (EU), International (Int), French (FR), Spanish (ES), Belgian (BE), Italian (IT), Australian (AU), New Zealander (NZ), Japanese (JP) and South Korean (KO).

For specific details and differences, click a convention name above.

EU and Int are identical but with alternative names. US, UK and EU/Int are the most common. Product tags usually show sizes in several conventions.

Bra tag with various size conventions
Image: Bra tag with various size conventions.

Sizes consist of three parts: the convention abbreviation; a number, representing the band size; and a letter, representing the cup size. The order of these three parts can vary, for example: "US 32D", "D75 EU" and "AU 10C".

Sizes are just labels. The numbers and letters often mean different things depending on the convention, even if the measurements are identical. This mean, for example, that an EU A-cup and an US A-cup are not the same.

US and UK sizes are based on inches, the rest on centimeters. 1 inch equals 2.54 cm, and as a result, the size conversions do not fit together well. Approximations are necessary, especially for bra cups. Most bra conversion tables ignore or assume that the conventions fit perfectly together making them highly inaccurate.

See additional notes for more similarities and differences between the sizing conventions.

Sizes Are Labels - Not Measurements

Bra cup sizes and their actual volume
Image: Bra sizes are often misunderstood.

Don't mistake the sizes for measurements. Sizes are just "labels". For example, "10" in "AU 10C" refers to 70-75 cm under bust, it does not refer to a measurement of 10 cm or 10 inches. Bra cups are even more misunderstood. They refer to differences between under bust and over bust measurements but also depend on the band size and mean different things depending on which band size they are based on.

Bra Band Size Conversions

Band sizes are based on under bust measurements measured snugly and firmly. US and UK band sizes are divided in steps of 2 inches, while the rest in steps of 5 cm. The steps are not identical as 2 inches equals 5.08 cm.

Precise Conversion

Since the size steps (2 inches and 5 cm respectively) are not identical, there are offsets and overlaps. These differences are more noticeable in larger sizes. The following is a precise and accurate conversion chart.

Bra Band Size Conversions with Respect to Differences Between Centimeters and Inches
CM
  • 55
  • 60
  • 65
  • 70
  • 75
  • 80
  • 85
  • 90
  • 95
  • 100
  • 105
  • 110
  • 115
  • 120
  • 125
  • 130
  • 135
  • 140
  • 145
  • 150
  • 155
International
EU/JP/KO
  • 55
  • 60
  • 65
  • 70
  • 75
  • 80
  • 85
  • 90
  • 95
  • 100
  • 105
  • 110
  • 115
  • 120
  • 125
  • 130
  • 135
  • 140
  • 145
  • 150
FR/ES/BE
  • 70
  • 75
  • 80
  • 85
  • 90
  • 95
  • 100
  • 105
  • 110
  • 115
  • 120
  • 125
  • 130
  • 135
  • 140
  • 145
  • 150
  • 155
  • 160
  • 165
IT
  • 00
  • 0
  • 1
  • 2
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
AU/NZ
  • 4
  • 6
  • 8
  • 10
  • 12
  • 14
  • 16
  • 18
  • 20
  • 22
  • 24
  • 26
  • 28
  • 30
  • 32
  • 34
  • 36
  • 38
  • 40
  • 42
US/UK
  • 26
  • 28
  • 30
  • 32
  • 34
  • 36
  • 38
  • 40
  • 42
  • 44
  • 46
  • 48
  • 50
  • 52
  • 54
  • 56
  • 58
  • 60
  • 62
  • 64
IN
  • 22
  • 24
  • 26
  • 28
  • 30
  • 32
  • 34
  • 36
  • 38
  • 40
  • 42
  • 44
  • 46
  • 48
  • 50
  • 52
  • 54
  • 56
  • 58
  • 60
  • 62
Chart: Precise and accurate band size conversion. Download as image.

Traditional Conversion (Recommended)

Even though band sizes based on metric (cm) and imperial units (inches) are not identical, the relatively small differences are almost always ignored leading to the usage of a standard but approximate conversion table. Due to the small differences, the traditional/standard conversion is recommended as it's also most widely used.

International Bra Band Sizes and Conversions
Under Bust
Corresponding Band Sizes
CM INCH International (Int) &
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 cm 22-24 in 55 26 26 70 00 4 55
60-65 cm 24-26 in 60 28 28 75 0 6 60
65-70 cm 26-28 in 65 30 30 80 1 8 65
70-75 cm 28-30 in 70 32 32 85 2 10 70
75-80 cm 30-32 in 75 34 34 90 3 12 75
80-85 cm 32-34 in 80 36 36 95 4 14 80
85-90 cm 34-36 in 85 38 38 100 5 16 85
90-95 cm 36-38 in 90 40 40 105 6 18 90
95-100 cm 38-40 in 95 42 42 110 7 20 95
100-105 cm 40-42 in 100 44 44 115 8 22 100
105-110 cm 42-44 in 105 46 46 120 9 24 105
110-115 cm 44-46 in 110 48 48 125 10 26 110
115-120 cm 46-48 in 115 50 50 130 11 28 115
120-125 cm 48-50 in 120 52 52 135 12 30 120
125-130 cm 50-52 in 125 54 54 140 13 32 125
130-135 cm 52-54 in 130 56 56 145 14 34 130
135-140 cm 54-56 in 135 58 58 150 15 36 135
140-145 cm 56-58 in 140 60 60 155 16 38 140
145-150 cm 58-60 in 145 62 62 160 17 40 145
150-155 cm 60-62 in 150 64 64 165 18 42 150
Table: International bra band sizes and approximative conversions. Measurements in centimeters and inches, and corresponding band sizes. Download as image.

Bra Cup Size Conversions

Cup sizes are determined by calculating the difference between over bust (where the bust is the fullest) and under bust measurements. For example: Over bust 85 cm and under bust 70 cm gives the difference of 15 cm, which gives an European B-cup. If the under bust measurement it rounded down, then always base the difference calculation on this rounded number. For example: For measurements over bust 85 cm and under bust 74 cm the difference would seem to be 11 cm. However, we must round down 74 to 70, so the difference is calculated as 85-70=15 cm.

US and UK cup sizes are divided in steps of 1 inch, JP and KO in steps of 2.5 cm (almost but not exactly 1 inch), while the rest in steps of 2 cm. (1 inch = 2.54 cm.)

Be careful of alternative sizing. AU, NZ and IT cup sizes were originally divided in steps of 2.5 cm (almost but not exactly 1 inch). Nowadays, most producers from these countries have adopted the EU / International bra cup sizing convention which is de facto becoming the new standard. However, there are still producers using the 2.5 cm cup size steps.

Precise Conversion (Recommended)

The cup size steps (1 inch and 2 cm respectively) are significantly different and so are the offsets and overlaps, much more so than in band sizes. The Internet is filled with conversion tables that ignores this and are therefore completely wrong, especially in sizes above D-cup. The following is a precise and accurate conversion table for bra cups. It's highly recommended to use this table over approximative tables.

Bra Cup Size Conversions with Respect to Differences Between Centimeters and Inches
CM
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
  • 21
  • 22
  • 23
  • 24
  • 25
  • 26
  • 27
  • 28
  • 29
  • 30
  • 31
  • 32
  • 33
  • 34
  • 35
  • 36
  • 37
  • 38
  • 39
  • 40
  • 41
  • 42
  • 43
  • 44
  • 45
  • 46
  • 47
  • 48
  • 49
  • 50
  • 51
International
EU/FR/ES/BE/IT
  • AA
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • R
  • S
  • T
AU/NZ
  • AA
  • A
  • B
  • C
  • D
  • DD
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
  • R
  • S
JP/KO
  • AA
  • A
  • B
  • C
  • D
  • E
  • F
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
US
  • AA
  • A
  • B
  • C
  • D
  • E/DD
  • F/DDD
  • G
  • H
  • I
  • J
  • K
  • L
  • M
  • N
  • O
  • P
UK
  • AA
  • A
  • B
  • C
  • D
  • DD
  • E
  • F
  • FF
  • G
  • GG
  • H
  • HH
  • J
  • JJ
  • K
  • KK
IN
  • 3
  • 4
  • 5
  • 6
  • 7
  • 8
  • 9
  • 10
  • 11
  • 12
  • 13
  • 14
  • 15
  • 16
  • 17
  • 18
  • 19
  • 20
Chart: Precise and accurate cup size conversion. Download as image.

Traditional Conversion

Cup sizes do not convert cleanly and precisely. For every four cup sizes based on inches there are five sizes based on centimeters. This means that some sizes convert into a several. The tables below convert sizes with the starting point of the cup steps being 2 cm (EU/Int/AU/NZ/FR/ES/BE/IT), 2.5 cm (JP/KO) and 1 inch (US/UK) respectively. Using three tables makes the conversion process easier. Please note that the precise method above is recommended.

Convert bra cups from EU/Int/AU/NZ/FR/ES/BE/IT to US/UK and JP/KO:

International Bra Cup Sizes and Conversions - Based on EU/Int Sizes and Centimeters
Over / Under
Bust Difference
Corresponding Cup Sizes
CM Europe (EU) &
International (Int)
USA (US) UK (UK) France (FR),
Spain (ES) &
Belgium (BE)
Italy (IT) Australia (AU) &
New Zealand (NZ)
Japan (JP) &
South Korea (KO)
0-12 cm AA A A AA AA AA A
12-14 cm A B B A A A B
14-16 cm B B or C B or C B B B B or C
16-18 cm C C C C C C C
18-20 cm D D D D D D D
20-22 cm E E/DD DD E E DD E
22-24 cm F F/DDD E F F E F
24-26 cm G F/DDD or G/DDDD E or F G G F F or G
26-28 cm H G/DDDD F H H G G
28-30 cm I H FF I I H H
30-32 cm J I G J J I I
32-34 cm K J GG K K J J
34-36 cm L J or K GG or H L L K J or K
36-38 cm M K H M M L K
38-40 cm N L HH N N M L
40-42 cm O M J O O N M
42-44 cm P N JJ P P O N
44-46 cm R N or O JJ or K R R P N or O
46-48 cm S O K S S R O
48-50 cm T P KK T T S P
Table: International bra cup sizes and approximative conversions. Measurements in centimeters, and corresponding cup sizes. Download as image.

Convert bra cups from US/UK to EU/Int/AU/NZ/FR/ES/BE/IT and JP/KO:

International Bra Cup Sizes and Conversions - Based on US/UK Sizes and Inches
Over / Under
Bust Difference
Corresponding Cup Sizes
INCH USA (US) UK (UK) Europe (EU) &
International (Int)
France (FR),
Spain (ES) &
Belgium (BE)
Italy (IT) Australia (AU) &
New Zealand (NZ)
Japan (JP) &
South Korea (KO)
0-4 in AA AA AA AA AA AA AA
4-5 in A A AA AA AA AA A
5-6 in B B A or B A or B A or B A or B B
6-7 in C C C C C C C
7-8 in D D D D D D D
8-9 in E/DD DD E or F E or F E or F DD or E E
9-10 in F/DDD E F or G F or G F or G E or F F
10-11 in G/DDDD F H H H G G
11-12 in H FF I I I H H
12-13 in I G J or K J or K J or K I or J I
13-14 in J GG K or L K or L K or L J or K J
14-15 in K H M M M L K
15-16 in L HH N N N M L
16-17 in M J O or P O or P O or P N or O M
17-18 in N JJ R R R P N
18-19 in O K S S S R O
19-20 in P KK T T T S P
Table: International bra cup sizes and approximative conversions. Measurements in inches, and corresponding cup sizes. Download as image.
Convert bra cups from JP/KO to EU/Int/AU/NZ/FR/ES/BE/IT and US/UK:
International Bra Cup Sizes and Conversions - Based on JP/KO Sizes and Centimeters
Over / Under
Bust Difference
Corresponding Cup Sizes
CM Japan (JP) &
South Korea (KO)
Europe (EU) &
International (Int)
USA (US) UK (UK) France (FR),
Spain (ES) &
Belgium (BE)
Italy (IT) Australia (AU) &
New Zealand (NZ)
7.5-10 cm AA AA AA AA AA AA AA
10-12.5 cm A AA A A AA AA AA
12.5-15 cm B A or B B B A or B A or B A or B
15-17.5 cm C C C C C C C
17.5-20 cm D D D D D D D
20-22.5 cm E E or F E/DD DD E or F E or F DD or E
22.5-25 cm F F or G F/DDD E F or G F or G E or F
25-27.5 cm G H G/DDDD F H H G
27.5-30 cm H I H FF I I H
30-32.5 cm I J or K I G J or K J or K I or J
32.5-35 cm J K or L J GG K or L K or L J or K
35-37.5 cm K M K H M M L
37.5-40 cm L N L HH N N M
40-42.5 cm M O or P M J O or P O or P N or O
42.5-45 cm N R N JJ R R P
45-47.5 cm O S O K S S R
47.5-50 cm P T P KK T T S
Table: International bra cup sizes and approximative conversions. Measurements in centimeters, based on Japanese and South Korean, and corresponding cup sizes. Download as image.

Download Charts and Tables as Images

You are welcome to download and share our bra size charts and tables as long as you keep the watermark and name. Click on an item below for full version.

Additional Notes

  • Why are most bra size chart conversion tables wrong? Bra sizes are often misunderstood and the tables are often created with an attempt to make all the sizing conventions to fit neatly together. But they don't fit, as shown in the precise charts. Excessive tweaking and forceful "matching" between charts and conventions create oversimplified and inaccurate information. This article is different by showing the actual relationship between size charts.
  • UK and US are based on inches. The rest on centimeters.
  • European (EU) and International (Int) size conventions are identical.
  • Australian (AU) and New Zealander (NZ) conventions are identical.
  • French (FR), Belgian (BE) and Spanish (ES) bra sizes are identical. Germany used the French sizing convention too but is nowadays primarily using EU/Int.
  • UK and US cup sizes increase in steps of 1 inch (2.54 cm), JP in steps of 2.5, the rest in steps of 2 cm.
  • UK and US have identical band sizes. Cup sizes increase for each inch but the size labeling differs after D-cup.
  • Some US bra cups have several accepted labels. DD are also knows as E, DDD as F etc. This is why US cup sizes are often written as "F/DDD". The trend is that multi-Ds are dropped.
  • Australian (AU) cup sizes are sometimes based on steps of 2.5 cm instead of 2 cm. Which convention is used depends on the preferences of the bra producer. Australian bra producers are moving towards using EU/Int sizing conventions.
  • Italian (IT) bra producers have started to incorporate the EU/Int band sizing convention.
  • Japanese (JP) convention is identical to South Korean (KO).

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