At HH cup the nursing range is genuinely limited, because most maternity brands do not grade this far. What we range is chosen for structure: cups deep enough to support a full bust, and bands firm enough to carry it.
What an HH cup nursing bra needs
Support has to come from the band, not the straps, or the shoulders take the load all day. The cup needs to accommodate significant change between full and empty, so a flexi-wire or a properly engineered wirefree often works better than a rigid wire in the early months.
Brands and styles
Hotmilk and Cake Maternity are the reliable ranges at HH cup. Browse wirefree maternity bras styles or all maternity and nursing.