Summary

The outline-width CSS property is used to set the width of the outline of an element. An outline is a line that is drawn around elements, outside the border edge, to make the element stand out:

• Initial value : medium
• Applies to: all elements
• Inherited : no
• Media: visual
• Computed value :

In browsers previous to Gecko 1.8 (Firefox 1.5) essentially the same effect can be achieved using Mozilla CSS Extension -moz-outline-width .

Syntax

outline-width: thin | medium | thick | 
<length>
 | inherit

Values

thin

Depends on the UA. Typically 1px in desktop browsers like Firefox.

medium

Depends on the UA. Typically 3px in desktop browsers like Firefox.

thick

Depends on the UA. Typically 5px in desktop browsers like Firefox.

<length>

See <length> values.

Examples

 thin   medium   thick   2px   1ex            5em 

Specifications

• See outline property

Browser compatibility

See also

outline , outline-width , outline-style , outline-color , outline-offset , -moz-outline-radius , -moz-outline-radius-topleft , -moz-outline-radius-topright , -moz-outline-radius-bottomright , -moz-outline-radius-bottomleft