Unsolved Height of a QListView item in css

[RITT]

I've got a QT Combobox Object. Now I want to design the Items of it (QListView) in a bigger context.
But QListView::item does not work....
any suggestions?

here my css:

QComboBox {
  background-color: rgb(204, 204, 204);
  border: 1px solid rgb(0, 0, 0);
  border-radius: 3px;
  font-family: "Tahoma";
  font-size: 12px;
  min-height: 30px;
}

QListView {
  padding: 2px 30px 2px 20px;
  background-color: rgb(204, 204, 204);
  border: 1px solid rgb(0, 0, 0);
  min-width: 90px;
  selection-background-color: rgba(0, 173, 165, 127);
}

QListView::item {
  color: red;
  height: 30px;
  padding: 2px 30px 2px 20px;
  border: 1px solid transparent;
}

QListView::item:selected {
  border-color: rgb(0, 173, 165);
  background-color: rgba(0, 173, 165, 127);
  color: blue;
}