QPushButton width and height don't correspond after applying a qstylesheet

I've this code:

Code:

---

#include <QApplication>
#include <QPushButton>
 
int main(int argc, char **argv) {
  QApplication a(argc, argv);
  QWidget *widget = new QWidget();
  widget->setFixedWidth(600);
  widget->setFixedHeight(600);
  QPushButton* button = new QPushButton(widget);
  button->setText("Test");
  button->setStyleSheet("QPushButton { background: red; width: 400px; height: 200px; }");
  int w = button->width();
  int h = button->height();
 
  QObject::connect(button, &QPushButton::clicked, button, [=]() { button->setText("W: " + QString::number(w) + " H: " + QString::number(h)); });
 
  widget->show();
  return a.exec();
}

---

The button is shown correctly (color is red and dimensions are right), but `w` and `h` variables are `100` and `30`, respectively. It seems that `width()` and `height()` does not take the updated values after applying the stylesheet.
How can I retrieve dimensions of a `QPushButton` correctly after applying a stylesheet?


I'm using Qt 5.11.0 on Visual Studio 2017 (64 bit).