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column-rule-width

The column-rule-width CSS property sets the width of the line drawn between columns in a multi-column layout.

Try it

Syntax

/* Keyword values */
column-rule-width: thin;
column-rule-width: medium;
column-rule-width: thick;

/* <length> values */
column-rule-width: 1px;
column-rule-width: 2.5em;

/* Global values */
column-rule-width: inherit;
column-rule-width: initial;
column-rule-width: revert;
column-rule-width: revert-layer;
column-rule-width: unset;

The column-rule-width property is specified as a single <'border-width'> value.

Values

<'border-width'>

Is a keyword defined by border-width describing the width of the rule. It may be either a <length> or one of the thin, medium, or thick keywords.

Formal definition

Initial value medium
Applies to multicol elements
Inherited no
Computed value the absolute length; 0 if the column-rule-style is none or hidden
Animation type a length

Formal syntax

column-rule-width = 
  <line-width>  

<line-width> = 
  <length [0,∞]>  |
  thin            |
  medium          |
  thick

Examples

Setting a thick column rule

HTML

<p>
  This is a bunch of text split into three columns. The `column-rule-width`
  property is used to change the width of the line that is drawn between
  columns. Don't you think that's wonderful?
</p>

CSS

p {
  column-count: 3;
  column-rule-style: solid;
  column-rule-width: thick;
}

Result

Specifications

Specification
CSS Multi-column Layout Module Level 1
# crw

Browser compatibility

Desktop Mobile
Chrome Edge Firefox Internet Explorer Opera Safari WebView Android Chrome Android Firefox for Android Opera Android Safari on IOS Samsung Internet
column-rule-width 501 1212 523.5–74 10 1511.1 93 50≤37 5018 524 1411.1 91 5.01.0

See also

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https://developer.mozilla.org/en-US/docs/Web/CSS/column-rule-width