With style sheets, you can use numeric values to set style properties in multiple ways:
- absolutely, meaning in units which are independent of the form of output (such as in centimetres);
- relatively, meaning in units relative to an element.
Style sheet values may be given either in integers or in real numbers (digits with an integer part and a decimal part).
These values can, in some cases, be negative (preceded with a minus sign "-"). However, some properties have upper and lower limits to the values they can take.
The absolute units offered by the CSS standard are summarised in this chart: