shape-margin

The shape-margin CSS property sets a margin for a CSS shape created using shape-outside.

The margin lets you adjust the distance between the edges of the shape (the float element) and the surrounding content.

Syntax

/* <length> values */
shape-margin: 10px;
shape-margin: 20mm;

/* <percentage> value */
shape-margin: 60%;

/* Global values */
shape-margin: inherit;
shape-margin: initial;
shape-margin: revert;
shape-margin: unset;

Values

<length-percentage>: Sets the margin of the shape to a <length> value or to a <percentage> of the width of the element's containing block.

Formal definition

Initial value	`0`
Applies to	floats
Inherited	no
Percentages	refer to the width of the containing block
Computed value	as specified, but with relative lengths converted into absolute lengths
Animation type	a length, percentage or calc();

Formal syntax

<length-percentage>where 
<length-percentage> = <length> | <percentage>

Examples

Adding a margin to a polygon

HTML

<section>
<div class="shape"></div>
We are not quite sure of any one thing in biology; our knowledge of geology
is relatively very slight, and the economic laws of society are
uncertain to every one except some individual who attempts to set them
forth; but before the world was fashioned the square on the hypotenuse
was equal to the sum of the squares on the other two sides of a right
triangle, and it will be so after this world is dead; and the inhabitant
of Mars, if one exists, probably knows its truth as we know it.</section>

CSS

section {
  max-width: 400px;
}

.shape {
  float: left;
  width: 150px;
  height: 150px;
  background-color: maroon;
  clip-path: polygon(0 0, 150px 150px, 0 150px);
  shape-outside: polygon(0 0, 150px 150px, 0 150px);
  shape-margin: 20px;
}

Result

Specifications

Specification
CSS Shapes Module Level 2 (CSS Shapes 2) # shape-margin-property

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
`shape-margin`	37	79	62	No	24	10.1 10.1	37	37	62	24	10.3	3.0