content/files/en-us/web/css/border-block-end-width/index.md at main · mdn/content · GitHub

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---
title: border-block-end-width
slug: Web/CSS/border-block-end-width
page-type: css-property
browser-compat: css.properties.border-block-end-width
---

{{CSSRef}}

The **`border-block-end-width`** [CSS](/en-US/docs/Web/CSS) property defines the width of the logical block-end border of an element, which maps to a physical border width depending on the element's writing mode, directionality, and text orientation. It corresponds to the {{cssxref("border-top-width")}}, {{cssxref("border-right-width")}}, {{cssxref("border-bottom-width")}}, or {{cssxref("border-left-width")}} property depending on the values defined for {{cssxref("writing-mode")}}, {{cssxref("direction")}}, and {{cssxref("text-orientation")}}.

{{InteractiveExample("CSS Demo: border-block-end-width")}}

```css interactive-example-choice
border-block-end-width: thick;
writing-mode: horizontal-tb;
```

```css interactive-example-choice
border-block-end-width: thick;
writing-mode: vertical-rl;
```

```css interactive-example-choice
border-block-end-width: 4px;
writing-mode: horizontal-tb;
```

```css interactive-example-choice
border-block-end-width: 4px;
writing-mode: vertical-lr;
```

```html interactive-example
<section class="default-example" id="default-example">
  <div class="transition-all" id="example-element">
    This is a box with a border around it.
  </div>
</section>
```

```css interactive-example
#example-element {
  background-color: palegreen;
  color: #000;
  border: 0 solid crimson;
  padding: 0.75em;
  width: 80%;
  height: 100px;
  unicode-bidi: bidi-override;
}
```

## Syntax

```css
/* <'border-width'> values */
border-block-end-width: 5px;
border-block-end-width: thick;

/* Global values */
border-block-end-width: inherit;
border-block-end-width: initial;
border-block-end-width: revert;
border-block-end-width: revert-layer;
border-block-end-width: unset;
```

Related properties are {{cssxref("border-block-start-width")}}, {{cssxref("border-inline-start-width")}}, and {{cssxref("border-inline-end-width")}}, which define the other border widths of the element.

### Values

- `<'border-width'>`
  - : The width of the border. See {{ cssxref("border-width") }}.

## Formal definition

{{CSSInfo}}

## Formal syntax

{{csssyntax}}

## Examples

### Border width with vertical text

#### HTML

```html
<div>
  <p class="exampleText">Example text</p>
</div>
```

#### CSS

```css
div {
  background-color: yellow;
  width: 120px;
  height: 120px;
}

.exampleText {
  writing-mode: vertical-lr;
  border: 1px solid blue;
  border-block-end-width: 5px;
}
```

#### Results

{{EmbedLiveSample("Border_width_with_vertical_text", 140, 140)}}

## Specifications

{{Specifications}}

## Browser compatibility

{{Compat}}

## See also

- [CSS Logical Properties and Values](/en-US/docs/Web/CSS/CSS_logical_properties_and_values)
- This property maps to one of the physical border properties: {{cssxref("border-top-width")}}, {{cssxref("border-right-width")}}, {{cssxref("border-bottom-width")}}, and {{cssxref("border-left-width")}}
- {{cssxref("writing-mode")}}, {{cssxref("direction")}}, {{cssxref("text-orientation")}}