Width and Height properties

More recent browsers support the following additional units of measurements (Internet Explorer 5.0 and later supports all of these units):

• cm—Centimeters.

• em—Size relative to parent element's size. For example, 2em is twice the size of the parent element.

• ex—Font size relative to the size of the parent font's lowercase x. For example, a font with the size 2ex is twice the size of the lowercase x in the parent font.

• in—Inches.

• mm—Millimeters.

• %—Percentage.

• pc—A pica represents 12 points.

• px—Pixels (the default value).

• pt—Points (1/72 of an inch).