40DD bra size
A 40DD in US and UK sizing is EU 90E, FR/BE 105E, AU/NZ 18DD and JP 90F.
US 40DD, also written 40E · UK 40DD
- Difference5 in12.7 cm
- Underbust, underbust method39 to 41 in99.06 to 104.14 cm
- Bust for this cup44.5 to 45.5 in113.03 to 115.57 cm
Each range includes its first figure and stops just short of its last.
Which measurements give a 40DD
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 | 39 to 41 in | 99.06 to 104.14 cm | 44.5 to 45.5 in |
| Add-4 method | 34.5 to 36.5 in | 87.63 to 92.71 cm | 44.5 to 45.5 in |
| EU method, band 90 | 34.45 to 36.42 in | 87.5 to 92.5 cm | Cup read in cm |
Each range includes its first figure and stops just short of its last.
40DD in six sizing systems
| System | Band | Cup | Size |
|---|---|---|---|
| US | 40 | DD/E | 40DD/E |
| UK | 40 | DD | 40DD |
| EU | 90 | E | 90E |
| FR/BE | 105 | E | 105E |
| AU/NZ | 18 | DD | 18DD |
| JP | 90 | F | 90F |
Bands and letters are label equivalents, not body measurements. JP letters vary by brand.
Sister sizes of 40DD
A sister size moves the band one step and the cup one letter the other way.
- 2 bands down36DDDD
- 1 band down38DDD
- 1 band up42D
- 2 bands up44C
Questions
What does 40DD mean?
40DD is a band of 40 with a cup that stands for a difference of 5 in (12.7 cm) between bust and band in US sizing.
What measurements give a 40DD?
By the underbust method, an underbust of 39 to 41 in (99.06 to 104.14 cm) gives band 40, and a bust of 44.5 to 45.5 in gives this cup. By the add-4 method, band 40 comes from an underbust of 34.5 to 36.5 in. Each range includes its first figure and stops just short of its last.
What are the sister sizes of 40DD?
The sister sizes of 40DD are 36DDDD, 38DDD, 42D and 44C. Each step up in band takes the cup one letter down, and each step down takes it one letter up.