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CSS Properties

accent-color align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function aspect-ratio backdrop-filter backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-position-x background-position-y background-repeat background-size block-size border border-block border-block-color border-block-end-color border-block-end-style border-block-end-width border-block-start-color border-block-start-style border-block-start-width border-block-style border-block-width border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-end-end-radius border-end-start-radius border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-inline border-inline-color border-inline-end-color border-inline-end-style border-inline-end-width border-inline-start-color border-inline-start-style border-inline-start-width border-inline-style border-inline-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-start-end-radius border-start-start-radius border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-reflect box-shadow box-sizing break-after break-before break-inside caption-side caret-color @charset clear clip clip-path color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-feature-settings font-kerning font-size font-size-adjust font-stretch font-style font-variant font-variant-caps font-weight gap grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-gap grid-column-start grid-gap grid-row grid-row-end grid-row-gap grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height hyphens image-rendering @import inline-size inset inset-block inset-block-end inset-block-start inset-inline inset-inline-end inset-inline-start isolation justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-block margin-block-end margin-block-start margin-bottom margin-inline margin-inline-end margin-inline-start margin-left margin-right margin-top mask-image mask-mode mask-origin mask-position mask-repeat mask-size max-height max-width @media max-block-size max-inline-size min-block-size min-inline-size min-height min-width mix-blend-mode object-fit object-position opacity order orphans outline outline-color outline-offset outline-style outline-width overflow overflow-anchor overflow-wrap overflow-x overflow-y padding padding-block padding-block-end padding-block-start padding-bottom padding-inline padding-inline-end padding-inline-start padding-left padding-right padding-top page-break-after page-break-before page-break-inside paint-order perspective perspective-origin pointer-events position quotes resize right rotate row-gap scale scroll-behavior scroll-margin scroll-margin-block scroll-margin-block-end scroll-margin-block-start scroll-margin-bottom scroll-margin-inline scroll-margin-inline-end scroll-margin-inline-start scroll-margin-left scroll-margin-right scroll-margin-top scroll-padding scroll-padding-block scroll-padding-block-end scroll-padding-block-start scroll-padding-bottom scroll-padding-inline scroll-padding-inline-end scroll-padding-inline-start scroll-padding-left scroll-padding-right scroll-padding-top scroll-snap-align scroll-snap-stop scroll-snap-type tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-decoration-thickness text-indent text-justify text-orientation text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function translate unicode-bidi user-select vertical-align visibility white-space widows width word-break word-spacing word-wrap writing-mode z-index



CSS outline-width Property


Example

Set the width of an outline:

div {outline-width: thick;}
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

An outline is a line that is drawn around elements, outside the borders, to make the element "stand out".

The outline-width specifies the width of an outline.

Note: Always declare the outline-style property before the outline-width property. An element must have an outline before you change the width of it.

Show demo ❯

Default value: medium
Inherited: no
Animatable: yes, see individual properties. Read about animatable Try it
Version: CSS2
JavaScript syntax: object.style.outlineWidth="12px" Try it

Tips and Notes

Note: Outlines differ from borders! Unlike border, the outline is drawn outside the element's border, and may overlap other content. Also, the outline is NOT a part of the element's dimensions; the element's total width and height is not affected by the width of the outline.


Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Property
outline-width 1.0 8.0 1.5 1.2 7.0


CSS Syntax

outline-width: medium|thin|thick|length|initial|inherit;

Property Values

Value Description Demo
medium Specifies a medium outline. This is default Demo ❯
thin Specifies a thin outline Demo ❯
thick Specifies a thick outline Demo ❯
length Allows you to define the thickness of the outline. Read about length units Demo ❯
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

More Examples

Example

Set the width of the outline to medium (this is default):

div {outline-width: medium;}
Try it Yourself »

Example

Set the width of the outline to thin:

div {outline-width: thin;}
Try it Yourself »

Example

Set the width of the outline to 1px:

div {outline-width: 1px;}
Try it Yourself »

Example

Set the width of the outline to 15px:

div {outline-width: 15px;}
Try it Yourself »

Related Pages

CSS tutorial: CSS Outline

CSS reference: outline property

HTML DOM reference: outlineWidth property