border-right-width

The border-right-width CSS property sets the width of the right border of an element.

Syntax

/* Keyword values */
border-right-width: thin;
border-right-width: medium;
border-right-width: thick;

/* <length> values */
border-right-width: 10em;
border-right-width: 3vmax;
border-right-width: 6px;

/* Global keywords */
border-right-width: inherit;
border-right-width: initial;
border-right-width: unset;

Values

<line-width>
Defines the width of the border, either as an explicit nonnegative <length> or a keyword. If it's a keyword, it must be one of the following values:
thin
A thin border
medium
A medium border
thick
A thick border

Note: Because the specification doesn't define the exact thickness denoted by each keyword, the precise result when using one of them is implementation-specific. Nevertheless, they always follow the pattern thin ≤ medium ≤ thick, and the values are constant within a single document.

Formal definition

Initial valuemedium
Applies toall elements. It also applies to ::first-letter.
Inheritedno
Computed valuethe absolute length or 0 if border-right-style is none or hidden
Animation typea length

Formal syntax

<line-width>

where
<line-width> = <length> | thin | medium | thick

Examples

Comparing border widths

HTML

<div>Element 1</div>
<div>Element 2</div>

CSS

div {
  border: 1px solid red;
  margin: 1em 0;
}

div:nth-child(1) {
  border-right-width: thick;
}
div:nth-child(2) {
  border-right-width: 2em;
}

Result

Specifications

Specification Status Comment
CSS Backgrounds and Borders Module Level 3
The definition of 'border-right-width' in that specification.
Candidate Recommendation No significant change.
CSS Level 2 (Revision 1)
The definition of 'border-right-width' in that specification.
Recommendation No significant change.
CSS Level 1
The definition of 'border-right-width' in that specification.
Recommendation Initial definition.

Browser compatibility

DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
border-right-widthChrome Full support 1Edge Full support 12Firefox Full support 1IE Full support 4Opera Full support 3.5Safari Full support 1WebView Android Full support 2.3Chrome Android Full support 18Firefox Android Full support 4Opera Android Full support 10.1Safari iOS Full support 1Samsung Internet Android Full support 1.0

Legend

Full support
Full support

See also