A 30DD bra fits a 30 inch underband with a five inch difference between your underbust and the fullest part of your bust. It has the same cup volume as a 32D and a 34C, but on a firmer, narrower band.
Our 30DD bras come mainly from Freya and Fantasie, with Panache, Curvy Kate and Shock Absorber adding more. If the band feels loose, your sister size is 28E. If it feels tight, try 32D.
Freya Plunge Bras in 30DD
Freya makes most of the 30DD plunge bras here, plus moulded T-shirt bras for a smooth line under fitted tops. Shop the full Freya range.
Fantasie Side Support and Balcony
Fantasie cuts most of the 30DD side support bras, which bring the bust forward for a narrower shape. Fantasie, Freya, Panache and Curvy Kate all make balcony bras in this size. Shop the full Fantasie range.
30DD Sports and Strapless Bras
Panache, Shock Absorber and Freya make 30DD sports bras. For off the shoulder tops, there are strapless styles from Fantasie, Curvy Kate and Freya.
Checking Your 30DD Fit
The band should sit level around your back and feel firm on the loosest hook. The centre of the bra should lie flat against your breastbone, and if it lifts away, try the next cup up. Use our bra size calculator or the fitting guide to check your size.
Related Sizes
All DD Cup Bras | 28DD Bras | 32DD Bras | 34DD Bras | 36DD Bras | 38DD Bras | 40DD Bras | 42DD Bras | 44DD Bras | 46DD Bras | 48DD Bras