W3cubDocs

apply_filters( 'intermediate_image_sizes', string[] $default_sizes )

Filters the list of intermediate image sizes.

$default_sizes: (string[]) An array of intermediate image size names. Defaults are 'thumbnail', 'medium', 'medium_large', 'large'.

Used By	Description
wp-includes/media.php: get_intermediate_image_sizes()	Gets the available intermediate image size names.

Version	Description
2.5.0	Introduced.

© 2003–2019 WordPress Foundation
Licensed under the GNU GPLv2+ License.
https://developer.wordpress.org/reference/hooks/intermediate_image_sizes