30C bra size
30C labels band 30 and cup C; its cup marks a 3 in difference between your bust and band.
US 30C · UK 30C
- Difference3 in7.6 cm
- Underbust, underbust method29 to 31 in73.66 to 78.74 cm
- Bust for this cup32.5 to 33.5 in82.55 to 85.09 cm
Each range includes its first figure and stops just short of its last.
Which measurements give a 30C
The label is a band and a cup, not a body measurement. Each of the three published rules turns the same label into different measurements.
| Method | Underbust (in) | Underbust (cm) | Bust (in) |
|---|---|---|---|
| Underbust method | 29 to 31 in | 73.66 to 78.74 cm | 32.5 to 33.5 in |
| Add-4 method | 24.5 to 26.5 in | 62.23 to 67.31 cm | 32.5 to 33.5 in |
| EU method, band 65 | 24.61 to 26.57 in | 62.5 to 67.5 cm | Cup read in cm |
Each range includes its first figure and stops just short of its last.
30C in six sizing systems
| System | Band | Cup | Size |
|---|---|---|---|
| US | 30 | C | 30C |
| UK | 30 | C | 30C |
| EU | 65 | C | 65C |
| FR/BE | 80 | C | 80C |
| AU/NZ | 8 | C | 8C |
| JP | 65 | D | 65D |
Bands and letters are label equivalents, not body measurements. JP letters vary by brand.
Sister sizes of 30C
A sister size moves the band one step and the cup one letter the other way.
A bust in the range 32.5 to 33.5 in maps to cup C on band 30 under the underbust method and the add-4 method. The 30C label names the tag, while your bust range comes from the method used.
The sister size 28D has the smaller band and larger cup, while 32B has the larger band and smaller cup. The sister size 34A moves two band steps up and two cup letters down. Published charts disagree on which underbust maps to band 30: the underbust method and add-4 method use non-overlapping ranges, while the EU method labels the band 65.
For 30C, the JP label is 65D, with cup D where the EU label 65C has cup C. The table does not list a JP label for the sister size 34A.
Questions
What does 30C mean?
30C is a band of 30 with a cup that stands for a difference of 3 in (7.6 cm) between bust and band in US sizing.
What measurements give a 30C?
By the underbust method, an underbust of 29 to 31 in (73.66 to 78.74 cm) gives band 30, and a bust of 32.5 to 33.5 in gives this cup. By the add-4 method, band 30 comes from an underbust of 24.5 to 26.5 in. Each range includes its first figure and stops just short of its last.
What are the sister sizes of 30C?
The sister sizes of 30C are 28D, 32B and 34A. Each step up in band takes the cup one letter down, and each step down takes it one letter up.