CSS border-top-width Property

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Example

Set a width for the top border:

div {border-top-width: thin;}
Try it Yourself »

More "Try it Yourself" examples below.

Definition and Usage

The border-top-width property sets the width of an element's top border.

Note: Always declare the border-style or the border-top-style property before the border-top-width property. An element must have borders before you can change the width.

Show demo ❯

Default value: medium
Inherited: no
Animatable: yes. Read about animatable Try it
Version: CSS1
JavaScript syntax: object.style.borderTopWidth="5px" Try it

Browser Support

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

Property
border-top-width 1.0 4.0 1.0 1.0 3.5

CSS Syntax

border-top-width: medium|thin|thick|length|initial|inherit;

Property Values

Value Description Demo
medium Specifies a medium top border. This is default Demo ❯
thin Specifies a thin top border Demo ❯
thick Specifies a thick top border Demo ❯
length Allows you to define the thickness of the top border. Read about length units Demo ❯
initial Sets this property to its default value. Read about initial
inherit Inherits this property from its parent element. Read about inherit

More Examples

Example

Set the width of the top border to medium:

div {border-top-width: medium;}
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Example

Set the width of the top border to thick:

div {border-top-width: thick;}
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Example

Set the width of the top border to 1px:

div {border-top-width: 1px;}
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Example

Set the width of the top border to 15px:

div {border-top-width: 15px;}
Try it Yourself »

Related Pages

CSS tutorial: CSS Border

CSS reference: border-top property

HTML DOM reference: borderTopWidth property


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