CSS shape-margin Property Reference

The CSS shape-margin property is a standard property in CSS Shapes. Review its formal syntax, computed behavior, and practical declarations.

Updated 2026-08-12

shape-margin overview

The CSS shape-margin property is a standard property in CSS Shapes. Review its formal syntax, computed behavior, and practical declarations.

The property is not inherited by default. Use an explicit global keyword when inheritance is intended.

Syntax and formal definition

shape-margin formal syntax

Field	Value
Formal syntax	<length-percentage>
Initial value	0
Applies to	floats
Inherited	No
Percentages	referToWidthOfContainingBlock
Computed value	asSpecifiedRelativeToAbsoluteLengths
Animation type	lpc
Media	visual
Specification group	CSS Shapes
Status	Standard

Practical examples

These declarations demonstrate valid ways to set shape-margin. The initial and inherit global keywords remain available even when a property-specific value is preferable.

shape-margin live example

CSS

.reset-example {
  shape-margin: initial;
}

.inherit-example {
  shape-margin: inherit;
}

@supports (shape-margin: initial) {
  .supported {
    shape-margin: initial;
  }
}