The secondary dimension cup size can be expressed in terms of the difference
cup size = bust girth - underbust girth
| Cup | AA | A | B | C | D | E | F | G | H |
| Cup size range | 10-12 | 12-14 | 14-16 | 16-18 | 18-20 | 20-22 | 22-24 | 24-26 | 26-28 |
Note 1:
If the cup size range is 12-14, you should read "the cup size must be greater than 12 and smaller or equal to 14".
Example 1
A woman with an underbust girth of 87 cm and a bust girth of 107 cm has cup size 20 cm (= 107 cm - 87 cm) or cup "D".
Example 2
A woman with an underbust girth of 89 cm and a bust girth of 108 cm has cup size 19 cm (= 108 cm - 89 cm) or cup "D".
Example 3
A woman with an underbust girth of 82 cm and a bust girth of 100 cm has cup size 18 cm (= 100 cm - 82 cm) or cup "C".
Note 2:
This tool automatically calculates the cup if the bust girth and underbust girth are entered. If the minimum and maximum values are entered the average value is used.
To display the cup in the pictogram you must always enter both the bust girth value and the underbust girth value. If you do not want to display the cup value in the pictogram, just remove the cup value from the input field.
Additional note:
Bras are labeled with the underbust girth (rounded to the nearest multiple of 5 cm), followed by a letter code that indicates the "cup size" defined earlier, according to this table defined by the standard.
The standard sizes for brassiere are based on a step of 5 cm:
| Underbust girth | 60 | 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | 115 | 120 | 125 |
| Range |
58 - 62 |
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 |
Note:
If the cup size range is 12-14, you should read "the cup size must be greater than 12 and smaller or equal to 14".
Example 1
A woman with an underbust girth of 87 cm and a bust girth of 107 cm has cup size 20 cm (= 107 cm - 87 cm) or "D". Her underbust girth rounded to the nearest multiple of 5 cm is 85 cm. Therefore, her bra size according to the standard is 85D.
Example 2
A woman with an underbust girth of 89 cm and a bust girth of 108 cm has cup size 19 cm (= 108 cm - 89 cm) or "D". Her underbust girth rounded to the nearest multiple of 5 cm is 90 cm. Therefore, her bra size according to the standard is 90D.
Example 3
A woman with an underbust girth of 82 cm and a bust girth of 100 cm has cup size 18 cm (= 100 cm - 82 cm) or "C". Her underbust girth rounded to the nearest multiple of 5 cm is 80 cm. Therefore, her bra size according to the standard is 80C.