CSS size Property
The css size property describes the orientation or dimensions of the page box. The ‘size’ property classifies a page box so that it is either ‘relative’ or ‘absolute’. ‘Absolute’ page boxes have a fixed size, whereas ‘relative’ page boxes will be scaled to fit the target paged media. In the case where a page box is smaller than the intended ‘size’, CSS2 recommends that it be centered on the page to allow for better alignment of multiple pages.