CSS3 box-sizing Property


Example

Specify that <div> elements should have padding and border included in the element's total width and height:

.div {
    width: 300px;
    height: 100px;
    border: 1px solid blue;
    box-sizing: border-box;
}

Try it yourself »

More "Try it Yourself" examples below.


Definition and Usage

The box-sizing property is used to tell the browser what the sizing properties (width and height) should include.

Should they include the border-box? Or just the content-box (which is the default value of the width and height properties)?

Default value: content-box
Inherited: no
Animatable: no. Read about animatable
Version: CSS3
JavaScript syntax: object.style.boxSizing="border-box" Try it

Browser Support

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

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

Property
box-sizing 10.0
4.0 -webkit-
8.0 29.0
2.0 -moz-
5.1
3.2 -webkit-
9.5

CSS Syntax

box-sizing: content-box|border-box|initial|inherit;

Property Values

Value Description
content-box Default. The width and height properties (and min/max properties) includes only the content. Border, padding, or margin are not included
border-box The width and height properties (and min/max properties) includes content, padding and border, but not the margin
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

Examples

More Examples

Example

Specify two bordered boxes side by side:

div {
    box-sizing: border-box;
    width: 50%;
    float: left;
}

Try it yourself »

Related Pages

CSS3 tutorial: CSS3 Box Sizing

HTML DOM reference: boxSizing property



SHARE THIS PAGE

COLOR PICKER

colorpicker





Search w3schools.com:

Translate w3schools.com: