Quite a few CSS style rules rely on dimensional properties in one form or another. It would be difficult to size elements with them.
Usage
Sets the height of an element.
Values
auto, length, %.
Sets the distance between lines of elements.
normal, length, %.
Sets the maximum height of an element.
none, length, %.
Sets the maximum width of an element.
Sets the minimum height of an element.
length, %.
Sets the minimum width of an element.
Sets the width of an element.