D Cup Size Guide
D cup represents a 4-inch bust-band difference and is considered a full cup size. It requires good support and offers substantial volume.
Quick Facts: D Cup
Bust-Band Difference
4 inches (10 cm)
Approx. Volume (34 band)
~450-550 ml
UK Equivalent
D
EU Equivalent
D
Common D Cup Sizes
D Cup Works Best For
- ✓Fuller figures
- ✓Those needing reliable support
- ✓Professional and formal occasions
- ✓All-day comfort needs
Common Challenges
- !Finding supportive yet attractive styles
- !Strap slippage
- !Underwire discomfort if sized wrong
Best Bra Styles for D Cup
Sister Sizes for D Cup
Sister sizes have the same cup volume with different band sizes. If your band feels too tight or loose, try a sister size.
Tighter Band
32DD
Your Size
34D
Looser Band
34C
Frequently Asked Questions: D Cup
Is a D cup big?
D cup is considered a full cup size, but size perception depends heavily on band size and body frame. A 32D looks quite different from a 40D.
What bras give the best support for D cups?
Look for bras with wide straps, full coverage cups, strong side support panels, and quality underwire construction for optimal D cup support.
Do D cups need special bras?
While D cups don't require specialty sizing, they do benefit from bras designed with better support features like wider straps and more substantial bands.
Find Your Perfect D Cup Bra
Use our calculator to confirm your size and get personalized recommendations.