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CSS Properties

align-content align-items align-self all animation animation-delay animation-direction animation-duration animation-fill-mode animation-iteration-count animation-name animation-play-state animation-timing-function backface-visibility background background-attachment background-blend-mode background-clip background-color background-image background-origin background-position background-repeat background-size border border-bottom border-bottom-color border-bottom-left-radius border-bottom-right-radius border-bottom-style border-bottom-width border-collapse border-color border-image border-image-outset border-image-repeat border-image-slice border-image-source border-image-width border-left border-left-color border-left-style border-left-width border-radius border-right border-right-color border-right-style border-right-width border-spacing border-style border-top border-top-color border-top-left-radius border-top-right-radius border-top-style border-top-width border-width bottom box-decoration-break box-shadow box-sizing caption-side caret-color @charset clear clip color column-count column-fill column-gap column-rule column-rule-color column-rule-style column-rule-width column-span column-width columns content counter-increment counter-reset cursor direction display empty-cells filter flex flex-basis flex-direction flex-flow flex-grow flex-shrink flex-wrap float font @font-face font-family font-kerning font-size font-size-adjust font-stretch font-style font-variant font-weight grid grid-area grid-auto-columns grid-auto-flow grid-auto-rows grid-column grid-column-end grid-column-gap grid-column-start grid-gap grid-row grid-row-end grid-row-gap grid-row-start grid-template grid-template-areas grid-template-columns grid-template-rows hanging-punctuation height justify-content @keyframes left letter-spacing line-height list-style list-style-image list-style-position list-style-type margin margin-bottom margin-left margin-right margin-top max-height max-width @media min-height min-width object-fit opacity order outline outline-color outline-offset outline-style outline-width overflow overflow-x overflow-y padding padding-bottom padding-left padding-right padding-top page-break-after page-break-before page-break-inside perspective perspective-origin position quotes resize right tab-size table-layout text-align text-align-last text-decoration text-decoration-color text-decoration-line text-decoration-style text-indent text-justify text-overflow text-shadow text-transform top transform transform-origin transform-style transition transition-delay transition-duration transition-property transition-timing-function unicode-bidi user-select vertical-align visibility white-space width word-break word-spacing word-wrap z-index



CSS background-size Property


Example

Specify the size of a background image with "auto" and in pixels:

#example1 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: auto;
}

#example2 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: 300px 100px;
}
Try it Yourself »

More "Try it Yourself" examples below.


Definition and Usage

The background-size property specifies the size of the background images.

There are four different syntaxes you can use with this property: the keyword syntax ("auto", "cover" and "contain"), the one-value syntax (sets the width of the image (height becomes "auto"), the two-value syntax (first value: width of the image, second value: height), and the multiple background syntax (separated with comma).

Default value: auto
Inherited: no
Animatable: yes. Read about animatable Try it
Version: CSS3
JavaScript syntax: object.style.backgroundSize="60px 120px" Try it

Browser Support

The numbers in the table specify the first browser version that fully supports the property.

Numbers followed by -webkit-, -moz-, or -o- specify the first version that worked with a prefix.

Property
background-size  4.0
1.0 -webkit-
9.0 4.0
3.6 -moz-
4.1
3.0 -webkit-
10.5
10.0 -o-


CSS Syntax

background-size: auto|length|cover|contain|initial|inherit;

Property Values

Value Description Play it
auto Default value. The background image is displayed in its original size Play it »
length Sets the width and height of the background image. The first value sets the width, the second value sets the height. If only one value is given, the second is set to "auto" Play it »
percentage Sets the width and height of the background image in percent of the parent element. The first value sets the width, the second value sets the height. If only one value is given, the second is set to "auto" Play it »
cover Resize the background image to cover the entire container, even if it has to stretch the image or cut a little bit off one of the edges Play it »
contain Resize the background image to make sure the image is fully visible Play it »
initial Sets this property to its default value. Read about initial Play it »
inherit Inherits this property from its parent element. Read about inherit

More Examples

Example

Specify the size of a background image with percent:

#example1 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: 100% 100%;
}

#example2 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: 75% 50%;
}
Try it Yourself »

Example

Specify the size of a background image with "cover":

#example1 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: cover;
}
Try it Yourself »

Example

Specify the size of a background image with "contain":

#example1 {
    background: url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: contain;
}
Try it Yourself »

Example

Here we have two background images. We specify the size of the first background image with "contain", and the second background-image with "cover":

#example1 {
    background: url(img_tree.gif), url(mountain.jpg);
    background-repeat: no-repeat;
    background-size: contain, cover;
}
Try it Yourself »

Related Pages

CSS tutorial: CSS Backgrounds

HTML DOM reference: backgroundSize property