Title: post_thumbnail_size
Published: April 25, 2014
Last modified: May 20, 2026

---

# apply_filters( ‘post_thumbnail_size’, string|int[] $size, int $post_id )

## In this article

 * [Parameters](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#parameters)
 * [Source](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#source)
 * [Related](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#related)
 * [Changelog](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#changelog)

[ Back to top](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#wp--skip-link--target)

Filters the post thumbnail size.

## 󠀁[Parameters](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#parameters)󠁿

 `$size`string|int[]

Requested image size. Can be any registered image size name, or an array of width
and height values in pixels (in that order).

`$post_id`int

The post ID.

## 󠀁[Source](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#source)󠁿

    ```php
    $size = apply_filters( 'post_thumbnail_size', $size, $post->ID );
    ```

[View all references](https://developer.wordpress.org/reference/files/wp-includes/post-thumbnail-template.php/)
[View on Trac](https://core.trac.wordpress.org/browser/tags/7.0/src/wp-includes/post-thumbnail-template.php#L184)
[View on GitHub](https://github.com/WordPress/wordpress-develop/blob/7.0/src/wp-includes/post-thumbnail-template.php#L184-L184)

## 󠀁[Related](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#related)󠁿

| Used by | Description | 
| [get_the_post_thumbnail()](https://developer.wordpress.org/reference/functions/get_the_post_thumbnail/)`wp-includes/post-thumbnail-template.php` |

Retrieves the post thumbnail.

  |

## 󠀁[Changelog](https://developer.wordpress.org/reference/hooks/post_thumbnail_size/?output_format=md#changelog)󠁿

| Version | Description | 
| [4.9.0](https://developer.wordpress.org/reference/since/4.9.0/) | Added the `$post_id` parameter. | 
| [2.9.0](https://developer.wordpress.org/reference/since/2.9.0/) | Introduced. |

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