42B bra size
42B means band 42 with cup B, a 2 in difference between your bust and the band label.
US 42B · UK 42B
- Difference2 in5.1 cm
- Underbust, underbust method41 to 43 in104.14 to 109.22 cm
- Bust for this cup43.5 to 44.5 in110.49 to 113.03 cm
Each range includes its first figure and stops just short of its last.
Which measurements give a 42B
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 | 41 to 43 in | 104.14 to 109.22 cm | 43.5 to 44.5 in |
| Add-4 method | 36.5 to 38.5 in | 92.71 to 97.79 cm | 43.5 to 44.5 in |
| EU method, band 95 | 36.42 to 38.39 in | 92.5 to 97.5 cm | Cup read in cm |
Each range includes its first figure and stops just short of its last.
42B in six sizing systems
| System | Band | Cup | Size |
|---|---|---|---|
| US | 42 | B | 42B |
| UK | 42 | B | 42B |
| EU | 95 | B | 95B |
| FR/BE | 110 | B | 110B |
| AU/NZ | 20 | B | 20B |
| JP | 95 | C | 95C |
Bands and letters are label equivalents, not body measurements. JP letters vary by brand.
Sister sizes of 42B
A sister size moves the band one step and the cup one letter the other way.
- 2 bands down38D
- 1 band down40C
- 1 band up44A
- 2 bands up46AA
For 42B, the cup difference is 2 in, and a bust from 43.5 to 44.5 in maps to cup B under both the underbust method and the add-4 method, with the upper endpoint excluded. Published charts disagree on which band the same underbust gives: these two methods use separate ranges, while the EU method assigns band 95 over its own centimetre range.
The EU label for 42B is 95B, while JP gives the same cup difference the label 95C. One published chart reports that JP letters vary by brand, so the letter used for 42B can vary across JP labels.
For 42B, 40C is the sister size with the band one step lower and cup one letter higher; 44A moves the band one step higher and the cup one letter lower. The JP sister size one step higher is not listed for 42B.
Questions
What does 42B mean?
42B is a band of 42 with a cup that stands for a difference of 2 in (5.1 cm) between bust and band in US sizing.
What measurements give a 42B?
By the underbust method, an underbust of 41 to 43 in (104.14 to 109.22 cm) gives band 42, and a bust of 43.5 to 44.5 in gives this cup. By the add-4 method, band 42 comes from an underbust of 36.5 to 38.5 in. Each range includes its first figure and stops just short of its last.
What are the sister sizes of 42B?
The sister sizes of 42B are 38D, 40C, 44A and 46AA. Each step up in band takes the cup one letter down, and each step down takes it one letter up.