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Update next/image docs for width & height #35188

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16 changes: 12 additions & 4 deletions docs/api-reference/next/image.md
Expand Up @@ -48,15 +48,23 @@ When using an external URL, you must add it to

### width

The width of the image, in pixels. Must be an integer without a unit.
The `width` property can represent either the _rendered_ width or _original_ width in pixels, depending on the [`layout`](#layout) and [`sizes`](#sizes) properties.

Required, except for statically imported images, or those with [`layout="fill"`](#layout).
When using `layout="intrinsic"`, `layout="fixed"`, or `layout="raw"` without `sizes`, the `width` property represents the _rendered_ width in pixels, so it will affect how large the image appears.

When using `layout="responsive"`, `layout="fill"`, or `layout="raw"` with `sizes`, the `width` property represents the _original_ width in pixels so it will only affect the aspect ratio.

The `width` property is required, except for [statically imported images](#local-images), or those with `layout="fill"`.

### height

The height of the image, in pixels. Must be an integer without a unit.
The `height` property can represent either the _rendered_ height or _original_ height in pixels, depending on the [`layout`](#layout) and [`sizes`](#sizes) properties.

When using `layout="intrinsic"`, `layout="fixed"`, or `layout="raw"` without `sizes`, the `height` property represents the _rendered_ height in pixels, so it will affect how large the image appears.

When using `layout="responsive"`, `layout="fill"`, or `layout="raw"` with `sizes`, the `height` property represents the _original_ height in pixels so it will only affect the aspect ratio.

Required, except for statically imported images, or those with [`layout="fill"`](#layout).
The `height` property is required, except for [statically imported images](#local-images), or those with `layout="fill"`.

## Optional Props

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4 changes: 2 additions & 2 deletions docs/basic-features/image-optimization.md
Expand Up @@ -150,8 +150,8 @@ One of the ways that images most commonly hurt performance is through _layout sh
Because `next/image` is designed to guarantee good performance results, it cannot be used in a way that will contribute to layout shift, and **must** be sized in one of three ways:

1. Automatically, using a [static import](#local-images)
2. Explicitly, by including a `height` **and** `width` property
3. Implicitly, by using `layout="fill"` which causes the image to expand to fill its parent element.
2. Explicitly, by including a [`width`](/docs/api-reference/next/image.md#width) and [`height`](/docs/api-reference/next/image.md#height) property
3. Implicitly, by using [`layout="fill"`](/docs/api-reference/next/image.md#layout) which causes the image to expand to fill its parent element.

> ### What if I don't know the size of my images?
>
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