admin_post_thumbnail_size – Hook | Developer.WordPress.org

apply_filters( ‘admin_post_thumbnail_size’, string|int[] $size, int $thumbnail_id, WP_Post $post )

Filters the size used to display the post thumbnail image in the ‘Featured image’ meta box.

Description

Note: When a theme adds ‘post-thumbnail’ support, a special ‘post-thumbnail’ image size is registered, which differs from the ‘thumbnail’ image size managed via the Settings > Media screen.

Parameters

$sizestring|int[]: Requested image size. Can be any registered image size name, or an array of width and height values in pixels (in that order).
$thumbnail_idint: Post thumbnail attachment ID.
$postWP_Post: The post object associated with the thumbnail.

Source

* Note: When a theme adds 'post-thumbnail' support, a special 'post-thumbnail'

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Changelog

Version	Description
4.4.0	Introduced.

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