background-size

Sets the size of the element's background image. Images can be left to their natural size, stretched, or constrained to fit the available space.

It is documented as part of the CSS Backgrounds and Borders specification.

/* Usage Example */
.full-bg {
  background-image: url(';bg.jpg');
  background-size: cover;
  /* ensures the image fills the container without stretching */
}

/* Global values */
background-size: inherit;
background-size: initial;
background-size: revert;
background-size: revert-layer;
background-size: unset;
Widely available Since 2015 96% global usage

This feature is well established and works across many devices and browser versions. It has been available across browsers since 2015.

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