Bra sizing by country

The bra sizing by company article has a chart of US brand sizes and their UK equivalent.

International bra size conversion

Band size conversion

Band sizes vary greatly among sizing systems, and even by brand, but intrasystem conversion can present reasonable starting point for estimating size.

Sizing conventions by band size^[2]

Under bust (cm)	63-67	68-72	73–77	78–82	83–87	88–92	93–97	98–102	103–107	108–112	113–117	118–122	123–127	128–132	133–137	138–142	143–147	148+
EU	55	60	65	70	75	80	85	90	95	100	105	110	115	120	125	130	135	140
B/E/F	70	75	80	85	90	95	100	105	110	115	120	125	130	135	140	145	150	155
I	-	0	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15	16
US/UK (in)	26	28	30	32	34	36	38	40	42	44	46	48	50	52	54	56	58	60
AUS	4	6	8	10	12	14	16	18	20	22	24	26	28	30	32	34	36	38

Cup size conversion

Cup sizes also vary greatly among different systems. However, they do not equate to one another, as cup size labeling for each system falls into one of two different methods: increasing cup size every inch method (US and UK), and increasing cup size for every two centimeters (all other systems). Since one inch does not equal two centimeters, but, rather, 2.54 centimeters, there is great discrepancy between the systems, which becomes more exaggerated as cup sizes increase.^[3]

EU

Band sizing in Europe and Japan (EU) does not correspond to underbust circumference, but one add 4 or 5 inches to her measurement, instead of taking the raw number. Thus, to find one's correct EU band size, a rough rule to follow is to round the underbust measurement to the nearest 5 (as band sizes increase in multiples of 5 centimeters, such as 55, 60, 65, 70, etc.), then subtract 10.

Cups increase by 2 centimeters for every band size, instead of the one inch (2.54 centimeters) in the UK and US systems. The Japanese labeling system differs only from Europe's in that cup size is listed before band size, such as "B70" instead of "70B".

Just like with other sizing systems, the number indicating band size and the number the bra actually stretches to can vary between brands. If you're looking to try a new brand online, it's always best to look for reviews on bra blogs and places like Bratabase and A Bra That Fits before purchasing.

AUS

The bra sizing method of Australia and New Zealand (AUS) is based on the UK method of cup size increasing by inch of band to bust but band size measured by dress size instead. These AUS dress sizes are only based on women with B and C cups, leading to inaccuracy if one chooses a bra based solely on dress size. Circumference of chest, as used in dress size, does not relay information regarding band size or cup size.

It most commonly employs UK cup labelling conventions from AA to DD but European from E cups on. Thus AUS brands skip FF cup and instead go straight from F to G, for example a few brands the Bendon Group owns. Online rtailers like Blush Bras and Isabellas Passion also sell size from dd to K cup Australian size.There is substantial variation and no consistent sizing accross brands and cups are rarely manufactured above a D and at most an AU G.

This amalgamation of size labelling conventions can cause substantial difficulty for AU/NZ women when seeking international bra conversions. However such conversions are essential in larger cup sizes as this market in AUS is met by equal parts UK, US and European manufacturers whose products display sizes in their own countries conventions without local equivalent mostly by online retailers.

Many local lingerie and large cup bra specialists are themselves confused by differences in cup labelling and offer misinformation. Bras and Things [1] for example suggests far more conformity than exists by presenting UK and US cup labels as identical to AUS in its international sizing chart while one of the handful of large cup retailers, Brava Lingerie [2] inaccurately suggests in its size conversion chart that European brands cup sizes increase by 2“ per cup. Such misinformation can result in women wearing cups four sizes and more too small.

It is best to check the brands sizing conventions before selecting ones to try on or order to ensure accurate fit and following the method for fit suggested for US bra sizing.

BEF

The system used in Belgium, Spain, and France (BEF) is similar to the one of Europe and Japan, except that the band size's numbered label is exactly 15 greater than EU's. For example, an EU band of 65 would equate to a BEF 80 band. hihi

I

The bra sizing method of Italy and the Czech Republic (I) is listed for mostly historical reasons, as most manufacturers have switched to the EU system. Cup size increased via the one inch system, and band sizes began at 0 for the European band size of 60.

Cup labeling

In spite of these intrasystem discrepancies, within a particular system, cup sizes still increase linearly. Do not confuse the following table with a conversion chart, which is above.

Cup labeling conventions

UK	AA	A	B	C	D	DD	E	F	FF	G	GG	H	HH	J	JJ	K	KK	L	LL	M	MM	N	NN	O	OO	P	PP
US	AA	A	B	C	D	DD/E	DDD/F	DDDD/G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
EU	AA	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
BEF	AA	A	B	C	D	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y	Z
I	-	A	B	C	D	DD	E	F	FF	G	GG	H	HH	J	JJ	K	KK	L	LL	M	MM	N	NN	O	OO	P	PP
AUS	AA	A	B	C	D	DD	E	F	G	H	I	J	K	L	M	N	O	P	Q	R	S	T	U	V	W	X	Y

See also

• Bra manufacturer
• Bra sizing by company
• How-to bra shop
• How-to determine bra size
• How-to tell if a bra fits
• Offline retailer
• Online retailer