The Size object is used to describe the size or dimensions of something, through its width and height properties.
Example: Create a size that is 10pt wide and 5pt high, and use it to define a rectangle:
var size = new Size(10, 5);
console.log(size.width); // 10
console.log(size.height); // 5
var rect = new Rectangle(new Point(20, 15), size);
console.log(rect); // { x: 20, y: 15, width: 10, height: 5 }
Size(width, height)Size(array)Size(object)Size(size)Size(point)+number, +size-number, -size*number, *size/number, /size%number, %sizewidthheight