listwidgetitem check box style sheet not working

[IknowQT]

Custom Controls

I am working on putting a user control using listwidgetitem. I tried setStylesheet to increase the size of the checkbox, but it does not work properly, so I ask a question.

void WToggleMenu::InitListitem()
{
	for (int n = 0; n < 20; n++)
	{
		usrCntrListItem* pListItem		= new usrCntrListItem(QString("%1").arg(n));

		QListWidgetItem* pWidgetItem	= new QListWidgetItem(this->ui.listWidget);
		pWidgetItem->setSizeHint(pListItem->sizeHint());

		this->ui.listWidget->addItem(pWidgetItem);
		this->ui.listWidget->setItemWidget(pWidgetItem, pListItem);
	}
}

usrCntrListItem::usrCntrListItem(QString strTitle)
{
	ui.setupUi(this);

	this->ui.text_Title->setText(strTitle);

	this->ui.chk_Enable->setStyleSheet("\
		QCheckBox::indicator\
		{\
			width: 50px;\
			height: 50px;\
		}");

}

I tried this and executed it, and although the size of the indicator in the view was the same, I was able to confirm that the area was changed when I actually clicked it.
Please suggest a way to change the stylesheet of the indicator