38B bra size
38B labels band 38 with cup B, marking a 2 in difference between your bust and the band for this size.
US 38B · UK 38B
- Difference2 in5.1 cm
- Underbust, underbust method37 to 39 in93.98 to 99.06 cm
- Bust for this cup39.5 to 40.5 in100.33 to 102.87 cm
Each range includes its first figure and stops just short of its last.
Which measurements give a 38B
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 | 37 to 39 in | 93.98 to 99.06 cm | 39.5 to 40.5 in |
| Add-4 method | 32.5 to 34.5 in | 82.55 to 87.63 cm | 39.5 to 40.5 in |
| EU method, band 85 | 32.48 to 34.45 in | 82.5 to 87.5 cm | Cup read in cm |
Each range includes its first figure and stops just short of its last.
38B in six sizing systems
| System | Band | Cup | Size |
|---|---|---|---|
| US | 38 | B | 38B |
| UK | 38 | B | 38B |
| EU | 85 | B | 85B |
| FR/BE | 100 | B | 100B |
| AU/NZ | 16 | B | 16B |
| JP | 85 | C | 85C |
Bands and letters are label equivalents, not body measurements. JP letters vary by brand.
Sister sizes of 38B
A sister size moves the band one step and the cup one letter the other way.
- 2 bands down34D
- 1 band down36C
- 1 band up40A
- 2 bands up42AA
For 38B, cup B matches a bust range of 39.5 to 40.5 in. That range is used by both the underbust method and the add-4 method, while band 38 remains the tag label.
The system labels for 38B keep cup B in US, UK, EU, FR/BE and AU/NZ, but the number changes in several tags. JP labels the same size 85C. Published charts disagree about which band corresponds to an underbust: the underbust method and add-4 method assign different bands, while the EU method uses centimetres and bands at 5 cm intervals.
For 38B, the JP cup letter is C, whereas EU uses B. Its sister size 36C moves the band down and the cup letter up, while 40A moves the band up and the cup letter down.
Questions
What does 38B mean?
38B is a band of 38 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 38B?
By the underbust method, an underbust of 37 to 39 in (93.98 to 99.06 cm) gives band 38, and a bust of 39.5 to 40.5 in gives this cup. By the add-4 method, band 38 comes from an underbust of 32.5 to 34.5 in. Each range includes its first figure and stops just short of its last.
What are the sister sizes of 38B?
The sister sizes of 38B are 34D, 36C, 40A and 42AA. Each step up in band takes the cup one letter down, and each step down takes it one letter up.