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Women’s Bras & Bralettes Reference Matrix

Women’s Bras & Bralettes Sizing & Measurement Matrix

Comprehensive reference matrix mapping women’s bra, bralette, and sports bra apparel brackets against ribcage band measurements, bust volume cup differentials, sister sizes, and supported styles.

Women’s Bras Standard Specifications

Detailed breakdown of standardized sizing brackets, ribcage band dimensions, bust cup differentials, sister sizes, and supported styles for women’s brassieres.

United States	Europe	United Kingdom	Italy	France	Australia	Japan	South Korea	China	Brazil	Mexico	International	Band Size ( $\text{cm}$ )	Band Size ( $\text{in}$ )	Bust Size ( $\text{cm}$ )	Bust Size ( $\text{in}$ )	Cup Letter	Cup Diff. ( $\text{cm}$ )	Cup Diff. ( $\text{in}$ )	Cup Size	Sister Size	Supported Styles
30A	65A	30A	1	80A	8	65A	65A	65A	38A	30A	S	76.2	30	78.7	31	A	2.5	1	30A	32AA	Wired / Bralette
30B	65B	30B	1	80B	8	65B	65B	65B	38B	30B	S	76.2	30	81.3	32	B	5.1	2	30B	32A	Wired / Sports Bra
30C	65C	30C	1	80C	8	65C	65C	65C	38C	30C	S	76.2	30	83.8	33	C	7.6	3	30C	32B	Wired / Bralette
30D	65D	30D	1	80D	8	65D	65D	65D	38D	30D	S	76.2	30	86.4	34	D	10.2	4	30D	32C	Wired / Sports Bra
30DD	65E	30E	1	80E	8	65E	65E	65E	38DD	30DD	S	76.2	30	88.9	35	DD	12.7	5	30DD	32D	Wired / Sports Bra
32A	70A	32A	2	85A	10	70A	70A	70A	40A	32A	M	81.3	32	83.8	33	A	2.5	1	32A	34AA	Wired / Bralette
32B	70B	32B	2	85B	10	70B	70B	70B	40B	32B	M	81.3	32	86.4	34	B	5.1	2	32B	34A	Wired / Sports Bra
32C	70C	32C	2	85C	10	70C	70C	70C	40C	32C	M	81.3	32	88.9	35	C	7.6	3	32C	34B	Wired / Bralette
32D	70D	32D	2	85D	10	70D	70D	70D	40D	32D	M	81.3	32	91.4	36	D	10.2	4	32D	34C	Wired / Sports Bra
32DD	70E	32E	2	85E	10	70E	70E	70E	40DD	32DD	M	81.3	32	94	37	DD	12.7	5	32DD	34D	Wired / Sports Bra
32DDD	70F	32F	2	85F	10	70F	70F	70F	40F	32DDD	M	81.3	32	96.5	38	DDD	15.2	6	32DDD	34DD	Full Support Wired
34A	75A	34A	3	90A	12	75A	75A	75A	42A	34A	L	86.4	34	88.9	35	A	2.5	1	34A	36AA	Wired / Bralette
34B	75B	34B	3	90B	12	75B	75B	75B	42B	34B	L	86.4	34	91.4	36	B	5.1	2	34B	36A	Wired / Sports Bra
34C	75C	34C	3	90C	12	75C	75C	75C	42C	34C	L	86.4	34	94	37	C	7.6	3	34C	36B	Wired / Bralette
34D	75D	34D	3	90D	12	75D	75D	75D	42D	34D	L	86.4	34	96.5	38	D	10.2	4	34D	36C	Wired / Sports Bra
34DD	75E	34E	3	90E	12	75E	75E	75E	42DD	34DD	L	86.4	34	99.1	39	DD	12.7	5	34DD	36D	Wired / Sports Bra
34DDD	75F	34F	3	90F	12	75F	75F	75F	42F	34DDD	L	86.4	34	101.6	40	DDD	15.2	6	34DDD	36DD	Full Support Wired
36F	80G	36FF	4	95G	14	80G	80G	80G	44G	36F	L	91.4	36	109.2	43	F	17.8	7	36F	38DDD	Full Support Wired
36A	80A	36A	4	95A	14	80A	80A	80A	44A	36A	XL	91.4	36	94	37	A	2.5	1	36A	38AA	Wired / Bralette
36B	80B	36B	4	95B	14	80B	80B	80B	44B	36B	XL	91.4	36	96.5	38	B	5.1	2	36B	38A	Wired / Sports Bra
36C	80C	36C	4	95C	14	80C	80C	80C	44C	36C	XL	91.4	36	99.1	39	C	7.6	3	36C	38B	Wired / Bralette
36D	80D	36D	4	95D	14	80D	80D	80D	44D	36D	XL	91.4	36	101.6	40	D	10.2	4	36D	38C	Wired / Sports Bra
36DD	80E	36E	4	95E	14	80E	80E	80E	44DD	36DD	XL	91.4	36	104.1	41	DD	12.7	5	36DD	38D	Wired / Sports Bra
36DDD	80F	36F	4	95F	14	80F	80F	80F	44F	36DDD	XL	91.4	36	106.7	42	DDD	15.2	6	36DDD	38DD	Full Support Wired
36F	80G	36FF	4	95G	14	80G	80G	80G	44G	36F	XL	91.4	36	109.2	43	F	17.8	7	36F	38DDD	Full Support Wired
38B	85B	38B	5	100B	16	85B	85B	85B	46B	38B	2XL	96.5	38	101.6	40	B	5.1	2	38B	40A	Wired / Sports Bra
38C	85C	38C	5	100C	16	85C	85C	85C	46C	38C	2XL	96.5	38	104.1	41	C	7.6	3	38C	40B	Wired / Bralette
38D	85D	38D	5	100D	16	85D	85D	85D	46D	38D	2XL	96.5	38	106.7	42	D	10.2	4	38D	40C	Wired / Sports Bra
38DD	85E	38E	5	100E	16	85E	85E	85E	46DD	38DD	2XL	96.5	38	109.2	43	DD	12.7	5	38DD	40D	Wired / Sports Bra
38DDD	85F	38F	5	100F	16	85F	85F	85F	46F	38DDD	2XL	96.5	38	111.8	44	DDD	15.2	6	38DDD	40DD	Full Support Wired
38F	85G	38FF	5	100G	16	85G	85G	85G	46G	38F	2XL	96.5	38	114.3	45	F	17.8	7	38F	40DDD	Full Support Wired
40C	90C	40C	6	105C	18	90C	90C	90C	48C	40C	3XL	101.6	40	109.2	43	C	7.6	3	40C	42B	Wired / Bralette
40D	90D	40D	6	105D	18	90D	90D	90D	48D	40D	3XL	101.6	40	111.8	44	D	10.2	4	40D	42C	Wired / Sports Bra
40DD	90E	40E	6	105E	18	90E	90E	90E	48DD	40DD	3XL	101.6	40	114.3	45	DD	12.7	5	40DD	42D	Wired / Sports Bra
40DDD	90F	40F	6	105F	18	90F	90F	90F	48F	40DDD	3XL	101.6	40	116.8	46	DDD	15.2	6	40DDD	42DD	Full Support Wired
40F	90G	40FF	6	105G	18	90G	90G	90G	48G	40F	3XL	101.6	40	119.4	47	F	17.8	7	40F	42DDD	Full Support Wired

* Sizing can vary significantly between international brands and regional manufacturers. Use this matrix as a baseline reference for standard proportional conversions.

Interpreting Women’s Bra Dimensions

Standardizing women’s bras, bralettes, and sports bras requires correlating precise dual-axis measurements—including ribcage band lengths and bust-to-underbust volume cup differentials—with international size specifications. Because proper support and weight distribution depend on achieving a secure band anchor without excessive cup compression, sizing spans across comprehensive global standards like US, UK, EU, French, Italian, and Australian formats.

When utilizing this matrix for garment selection or size conversion, reference ribcage band measurements alongside cup differentials and recommended sister sizes to account for regional manufacturing variations and cup progression steps across international lingerie markets.

Indexed Sizing Tiers & Dimensions

30ASize

Band: 76.2 cm (30″), Cup: 30A, Sister Size: 32AA mapping for US size 30A

Symbol: 30ABase Value: 76.2

30BSize

Band: 76.2 cm (30″), Cup: 30B, Sister Size: 32A mapping for US size 30B

Symbol: 30BBase Value: 76.2

30CSize

Band: 76.2 cm (30″), Cup: 30C, Sister Size: 32B mapping for US size 30C

Symbol: 30CBase Value: 76.2

30DSize

Band: 76.2 cm (30″), Cup: 30D, Sister Size: 32C mapping for US size 30D

Symbol: 30DBase Value: 76.2

30DDSize

Band: 76.2 cm (30″), Cup: 30DD, Sister Size: 32D mapping for US size 30DD

Symbol: 30DDBase Value: 76.2

32ASize

Band: 81.3 cm (32″), Cup: 32A, Sister Size: 34AA mapping for US size 32A

Symbol: 32ABase Value: 81.3

32BSize

Band: 81.3 cm (32″), Cup: 32B, Sister Size: 34A mapping for US size 32B

Symbol: 32BBase Value: 81.3

32CSize

Band: 81.3 cm (32″), Cup: 32C, Sister Size: 34B mapping for US size 32C

Symbol: 32CBase Value: 81.3

32DSize

Band: 81.3 cm (32″), Cup: 32D, Sister Size: 34C mapping for US size 32D

Symbol: 32DBase Value: 81.3

32DDSize

Band: 81.3 cm (32″), Cup: 32DD, Sister Size: 34D mapping for US size 32DD

Symbol: 32DDBase Value: 81.3

32DDDSize

Band: 81.3 cm (32″), Cup: 32DDD, Sister Size: 34DD mapping for US size 32DDD

Symbol: 32DDDBase Value: 81.3

34ASize

Band: 86.4 cm (34″), Cup: 34A, Sister Size: 36AA mapping for US size 34A

Symbol: 34ABase Value: 86.4

34BSize

Band: 86.4 cm (34″), Cup: 34B, Sister Size: 36A mapping for US size 34B

Symbol: 34BBase Value: 86.4

34CSize

Band: 86.4 cm (34″), Cup: 34C, Sister Size: 36B mapping for US size 34C

Symbol: 34CBase Value: 86.4

34DSize

Band: 86.4 cm (34″), Cup: 34D, Sister Size: 36C mapping for US size 34D

Symbol: 34DBase Value: 86.4

34DDSize

Band: 86.4 cm (34″), Cup: 34DD, Sister Size: 36D mapping for US size 34DD

Symbol: 34DDBase Value: 86.4

34DDDSize

Band: 86.4 cm (34″), Cup: 34DDD, Sister Size: 36DD mapping for US size 34DDD

Symbol: 34DDDBase Value: 86.4

36FSize

Band: 91.4 cm (36″), Cup: 36F, Sister Size: 38DDD mapping for US size 36F

Symbol: 36FBase Value: 91.4

36ASize

Band: 91.4 cm (36″), Cup: 36A, Sister Size: 38AA mapping for US size 36A

Symbol: 36ABase Value: 91.4

36BSize

Band: 91.4 cm (36″), Cup: 36B, Sister Size: 38A mapping for US size 36B

Symbol: 36BBase Value: 91.4

36CSize

Band: 91.4 cm (36″), Cup: 36C, Sister Size: 38B mapping for US size 36C

Symbol: 36CBase Value: 91.4

36DSize

Band: 91.4 cm (36″), Cup: 36D, Sister Size: 38C mapping for US size 36D

Symbol: 36DBase Value: 91.4

36DDSize

Band: 91.4 cm (36″), Cup: 36DD, Sister Size: 38D mapping for US size 36DD

Symbol: 36DDBase Value: 91.4

36DDDSize

Band: 91.4 cm (36″), Cup: 36DDD, Sister Size: 38DD mapping for US size 36DDD

Symbol: 36DDDBase Value: 91.4

36FSize

Band: 91.4 cm (36″), Cup: 36F, Sister Size: 38DDD mapping for US size 36F

Symbol: 36FBase Value: 91.4

38BSize

Band: 96.5 cm (38″), Cup: 38B, Sister Size: 40A mapping for US size 38B

Symbol: 38BBase Value: 96.5

38CSize

Band: 96.5 cm (38″), Cup: 38C, Sister Size: 40B mapping for US size 38C

Symbol: 38CBase Value: 96.5

38DSize

Band: 96.5 cm (38″), Cup: 38D, Sister Size: 40C mapping for US size 38D

Symbol: 38DBase Value: 96.5

38DDSize

Band: 96.5 cm (38″), Cup: 38DD, Sister Size: 40D mapping for US size 38DD

Symbol: 38DDBase Value: 96.5

38DDDSize

Band: 96.5 cm (38″), Cup: 38DDD, Sister Size: 40DD mapping for US size 38DDD

Symbol: 38DDDBase Value: 96.5

38FSize

Band: 96.5 cm (38″), Cup: 38F, Sister Size: 40DDD mapping for US size 38F

Symbol: 38FBase Value: 96.5

40CSize

Band: 101.6 cm (40″), Cup: 40C, Sister Size: 42B mapping for US size 40C

Symbol: 40CBase Value: 101.6

40DSize

Band: 101.6 cm (40″), Cup: 40D, Sister Size: 42C mapping for US size 40D

Symbol: 40DBase Value: 101.6

40DDSize

Band: 101.6 cm (40″), Cup: 40DD, Sister Size: 42D mapping for US size 40DD

Symbol: 40DDBase Value: 101.6

40DDDSize

Band: 101.6 cm (40″), Cup: 40DDD, Sister Size: 42DD mapping for US size 40DDD

Symbol: 40DDDBase Value: 101.6

40FSize

Band: 101.6 cm (40″), Cup: 40F, Sister Size: 42DDD mapping for US size 40F

Symbol: 40FBase Value: 101.6