A 40DD bra fits a 40 inch underband with a five inch difference between your underbust and the fullest part of your bust. On a 40 back the band carries more of the weight, so a firm, wide band matters as much as the cup.
Our 40DD bras come from Fantasie, Elomi, Royce, Panache and Freya. If the band feels loose, your sister size is 38E. If it feels tight, try 42D.
40DD Sports Bras
For running, the gym or high impact classes, there are 40DD sports bras from Panache, Freya, Shock Absorber, Elomi and Fantasie. Look for a wide underband and adjustable straps.
Side Support and Full Cup in 40DD
Fantasie makes most of the 40DD side support bras. For full coverage there are full cup bras from Fantasie, Royce, Triumph, Sculptresse and Elomi.
Elomi and Royce in 40DD
Elomi leads on plunge styles in this size, and Royce makes most of the non wired and nursing bras. Shop the full Elomi and Royce ranges.
Checking Your 40DD Fit
Check the fit in front of a mirror. The band should run level, the cups should be smooth with no gaping or spilling, and the centre should touch your breastbone. The bra size calculator and fitting guide take you through each step.
Related Sizes
All DD Cup Bras | 28DD Bras | 30DD Bras | 32DD Bras | 34DD Bras | 36DD Bras | 38DD Bras | 42DD Bras | 44DD Bras | 46DD Bras | 48DD Bras