Can I change titlebar height and frame width using stylesheet?

[melody:p]

I can change titlebar hegiht and frame width using qstyle like this :

int MyStyle::pixelMetric(PixelMetric which, const QStyleOption *option, const QWidget *widget) const
{
    switch (which)
   {
    case PM_DefaultFrameWidth:
        return 5;
    case PM_TitleBarHeight:
		return 50;
    default:
        return QWindowsStyle::pixelMetric(which, option, widget);
    }
}

int MyStyle::pixelMetric(PixelMetric which, const QStyleOption *option, const QWidget *widget) const
{
    switch (which)
   {
    case PM_DefaultFrameWidth:
        return 5;
    case PM_TitleBarHeight:
		return 50;
    default:
        return QWindowsStyle::pixelMetric(which, option, widget);
    }
}

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but I want to change them using style sheet.

Is it possible?
I search method to change them using style sheet some hours, but I can't find.

Can I change titlebar height and frame width only using qstyle??