stroke-width

The stroke-width attribute is a presentation attribute defining the width of the stroke to be applied to the shape.

You can use this attribute with the following SVG elements:

Example

<svg viewBox="0 0 30 10" xmlns="http://www.w3.org/2000/svg">
  <!-- Default stroke width: 1 -->
  <circle cx="5" cy="5" r="3" stroke="green" />

  <!-- Stroke width as a number -->
  <circle cx="15" cy="5" r="3" stroke="green"
          stroke-width="3" />

  <!-- Stroke width as a percentage -->
  <circle cx="25" cy="5" r="3" stroke="green"
          stroke-width="2%" />
</svg>

Usage notes

Value	<length> \| <percentage>
Default value	`1px`
Animatable	Yes

Note: A percentage value is always computed as a percentage of the normalized viewBox diagonal length.

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
`stroke-width`	?	?	?	?	?	?	?	?	?	?	?	?

Specifications

Specification	Status	Comment
Scalable Vector Graphics (SVG) 2 The definition of 'stroke-width' in that specification.	Candidate Recommendation	Definition for shapes and texts
Scalable Vector Graphics (SVG) 1.1 (Second Edition) The definition of 'stroke-width' in that specification.	Recommendation	Initial definition for shapes and texts

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https://developer.mozilla.org/en-US/docs/Web/SVG/Attribute/stroke-width