Your D cup bra should feel firm, supportive and comfortable throughout the day.
The band should sit level around your body without riding up. Your breasts should fit comfortably inside the cups without spilling, gaping or uncomfortable pressure.
If you're wearing an underwired bra, the wires should sit around your breast tissue. They shouldn't dig into your breasts or underarms.
Straps should stay securely in place without placing too much pressure on your shoulders. Most of your bra's support should come from the band, not the straps.
Remember, D cup breasts vary in size depending on your band measurement. A 10D and a 16D have different cup volumes.
Check your measurements using our Determine Your Size guide.