CSS border-image-outset Property

The CSS border-image-outset property specifies the amount by which the border image is extended beyond the element’s border box. It is one of the CSS3 properties. The border-image-outset property takes from one to four values.

  • When one value is specified, it specifies all the four outsets.
  • When two values are specified, the first one specifies the top and bottom outsets, and the second one specifies the right and left outsets.
  • When three values are specified, the first one specifies the top outset, the second one specifies the right and left outsets, and the third one specifies the bottom outset.
  • When four values are specified, the outsets are set on the top, right, bottom and left sides in that order.
Initial Value 0
Applies to All elements, except internal table elements when border-collapse is "collapse". It also applies to ::first-letter.
Inherited No.
Animatable No.
Version CSS3
DOM Syntax object.style.borderImageOutset = "20px";


border-image-outset: length | number | initial | inherit;

Example of the border-image-outset property:

<!DOCTYPE html>
    <title>Title of the document</title>
      .border {
        border: 10px solid transparent;
        padding: 15px;
        border-image: url("/uploads/media/default/0001/01/812bf6a749522b8185c1beee20dd99dd6c6c87da.jpeg");
        border-image-slice: 30;
        border-image-repeat: round;
        border-image-outset: 10px 0 15px;
    <h2>Border-image-outset property example</h2>
    <p class="border">Hello World!</p>
    <p>Here is the original image:</p>
    <img src="/uploads/media/default/0001/01/812bf6a749522b8185c1beee20dd99dd6c6c87da.jpeg" alt="Border Image" style="width:50%">


CSS border-image-outset description


Value Description Play it
length Specifies at what distance from the edges the border-image will appear. The default value is 0. Play it »
number The size of the border-image outset as a multiple of the element's corresponding border widths. Play it »
initial Sets the property to its default value. Play it »
inherit Inherits the property from its parent element.

Browser support

chrome edge firefox safari opera
15.0+ 12.0+ 15.0+ 6.0+ 15.0+

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