# Size
The size attributes are used to set the width, height, padding, and margin of a component.
> **NOTE**
>
> The APIs of this module are supported since API version 7. Updates will be marked with a superscript to indicate their earliest API version.
## Attributes
| Name | Type | Description |
| -------------- | ---------------------------------------- | ---------------------------------------- |
| width | [Length](ts-types.md#length) | Width of the component. By default, the width required to fully hold the component content is used. If the width of the component is greater than that of the parent container, the range of the parent container is drawn. |
| height | [Length](ts-types.md#length) | Height of the component. By default, the height required to fully hold the component content is used. If the height of the component is greater than that of the parent container, the range of the parent container is drawn. |
| size | {
width?: [Length](ts-types.md#length),
height?: [Length](ts-types.md#length)
} | Size of the component. |
| padding | [Padding](ts-types.md#padding) \| [Length](ts-types.md#length) | Padding of the component.
When the parameter is of the **Length** type, the four paddings take effect.
Default value: **0**
When **padding** is set to a percentage, the width of the parent container is used as the basic value.|
| margin | [Margin](ts-types.md#margin)) \| [Length](ts-types.md#length) | Margin of the component.
When the parameter is of the **Length** type, the four margins take effect.
Default value: **0**
When **margin** is set to a percentage, the width of the parent container is used as the basic value.|
| constraintSize | {
minWidth?: [Length](ts-types.md#length),
maxWidth?: [Length](ts-types.md#length),
minHeight?: [Length](ts-types.md#length),
maxHeight?: [Length](ts-types.md#length)
} | Constraint size of the component, which is used to limit the size range during component layout. **constraintSize** takes precedence over **width** and **height**.
Default value:
{
minWidth: 0,
maxWidth: Infinity,
minHeight: 0,
maxHeight: Infinity
} |
| layoutWeight | number \| string | Weight of the component during layout. When the container size is determined, the layout of the component and sibling components is allocated based on the weight along the main axis. The component size setting is ignored.
**NOTE**
This attribute is valid only for the **\**, **\**, and **\** layouts.
Default value: **0**|
## Example
```ts
// xxx.ets
@Entry
@Component
struct SizeExample {
build() {
Column({ space: 10 }) {
Text('margin and padding:').fontSize(12).fontColor(0xCCCCCC).width('90%')
// The width is 80, the height is 80, the padding is 20, and the margin is 20.
Row() {
Row() {
Row().size({ width: '100%', height: '100%' }).backgroundColor(0xAFEEEE)
}.width(80).height(80).padding(20).margin(20).backgroundColor(0xFDF5E6)
}.backgroundColor(0xFFA500)
Text('layoutWeight').fontSize(12).fontColor(0xCCCCCC).width('90%')
// When the container size is determined, the layout of the component and sibling components is allocated based on the weight along the main axis. The component size setting is ignored.
Row() {
// Weight 1
Text('layoutWeight(1)')
.size({ width: '30%', height: 110 }).backgroundColor(0xFFEFD5).textAlign(TextAlign.Center)
.layoutWeight(1)
// Weight 2
Text('layoutWeight(2)')
.size({ width: '30%', height: 110 }).backgroundColor(0xF5DEB3).textAlign(TextAlign.Center)
.layoutWeight(2)
// The default weight is 0.
Text('no layoutWeight')
.size({ width: '30%', height: 110 }).backgroundColor(0xD2B48C).textAlign(TextAlign.Center)
}.size({ width: '90%', height: 140 }).backgroundColor(0xAFEEEE)
}.width('100%').margin({ top: 5 })
}}
```
