get QML default value of a widget

How to receive the default value of e.g. TextEdit font.pointerSize?

I would like to create a custom widget that uses some default values but allows to set some values from outside. Therefore it is necessary - as far as I know - to add a property variable that is accessible from outside (in this example it's fontPointerSize). I want this default property to be the default of an existing QML widget.

main.qml

import QtQuick 2.0

Rectangle {
    id: background;
    color: "white";
    width: 200;
    height: 200;

    MyWidget {
        id: widget
        // fontPointerSize: 14
        anchors.topMargin: 8
        anchors.top: picker.bottom
    }
}

MyWidget.qml

import QtQuick 2.0

Rectangle {
    width: 100
    height: 26
    color: "orange"

    // how to get Text font.pointerSize default?
    property real fontPointerSize: 11

    Text {
        id: name
        text: qsTr("hello world")
        font.pointSize: fontPointerSize
        anchors.fill: parent

        horizontalAlignment: Text.AlignHCenter
        verticalAlignment: Text.AlignVCenter
    }
}