Size Guide

Did you know?

What very few women know: the letter in a bra size doesn’t actually indicate the absolute size of the cup! We’ll explain why a 70E, 75D, 80C, and 85B all have the same cup volume—the only thing that changes is the band size.

At first glance, it would seem logical that cup sizes increase alphabetically—A being small, and getting larger with each step. But that’s not exactly how it works. If you compare a 75B to a 100B, you’ll notice the cups are not the same size. Why is that?

The reason is that cup size and band size are proportionally related. This means the cup letter only refers to a specific cup volume when combined with a certain band size. This concept is known as "sister sizing" or "cross sizing."

With sister sizes, the cup volume remains the same, but the band size changes. For example, the cup of a 75B bra is the same size as that of a 70C or an 80A—only the band width is different. So, if you go down a band size, you need to go up a cup size to keep the same cup volume.

Quick Rule of Thumb:

One band size smaller → go one cup size up
One band size larger → go one cup size down

Our size charts

Bra sizes according to underbust width and cup

Cup size	A	B	C	D	E	F
65	78	80	82	84
70	83	85	87	89	91	93
75	88	90	92	94	96	98
80	93	95	97	99	101	103
85	98	100	102	104	106	108
90	103	105	107	109	111	113
95	108	110	112	114	116	118
100	113	115	117	119	121	123
105	125	120	122	124	126	128
110		125	127	129	131	133
115		130	132	134	136	138
120		135	137	139	141	143

Undersize Bust size

* All measurements in centimeters (cm). Values are based on average upper breast measurements per cup size.

Girdle pants

Clothing size	Waist measurement (cm)	Hip measurement (cm)
36	58–62	89–92
38	63–67	93–96
40	68–72	97–100
42	73–77	101–104
44	78–82	105–108
46	83–87	109–112
48	88–92	113–117
50	93–97	119–124
52	98–102	125–130
54	103–107	131–136
56	108–112	137–142
58	113–117	143–148
60	118–122	149–154