How to make size of button in the LineEdit smaller?

Question

I made the X button in the LineEdit, when i click on this button, the LineEdit is clear. But with my method, the X button looks a little big and not beautiful, I need to make it smaller. How I can do it?

myLineEdit = new LineEdit;
myLineEdit->setFixedHeight( 25 );
m_clear = m_lineEdit->addAction( QIcon( ":/clearButton" ), QLineEdit::TrailingPosition );

the size of clearButton.png is 12x12 px, so in this case it is enlarged and looks not beautiful like this.

Answer 1

For this solution it is assumed that in the original image the relationship between the foreground size and the background is 1: 1 (this is normal in the icons), so the solution is to increase that relationship, for this we create a new image

QPixmap in(":/clearButton");
QPixmap out(in.size()*10/7);
QRect r= in.rect();
r.moveCenter(out.rect().center());
out.fill(Qt::transparent);

QPainter painter(&out);
painter.drawPixmap(r , in);
painter.end();

QLineEdit *m_lineEdit = new QLineEdit;
m_lineEdit->setFixedHeight(25);
m_lineEdit->addAction(QIcon(out), QLineEdit::TrailingPosition);

Before:

After: