diff --git a/wp-admin/includes/image.php b/wp-admin/includes/image.php
index 74d08bf634..1a9c9e2e9c 100644
--- a/wp-admin/includes/image.php
+++ b/wp-admin/includes/image.php
@@ -190,6 +190,7 @@ function wp_update_image_subsizes( $attachment_id ) {
  * Updates the attached file and image meta data when the original image was edited.
  *
  * @since 5.3.0
+ * @since 6.0.0 The `$filesize` value was added to the returned array.
  * @access private
  *
  * @param array  $saved_data    The data returned from WP_Image_Editor after successfully saving an image.
@@ -211,12 +212,12 @@ function _wp_image_meta_replace_original( $saved_data, $original_file, $image_me
 	// Make the file path relative to the upload dir.
 	$image_meta['file'] = _wp_relative_upload_path( $new_file );
 
-	// Store the original image file name in image_meta.
-	$image_meta['original_image'] = wp_basename( $original_file );
-
 	// Add image file size.
 	$image_meta['filesize'] = wp_filesize( $new_file );
 
+	// Store the original image file name in image_meta.
+	$image_meta['original_image'] = wp_basename( $original_file );
+
 	return $image_meta;
 }
 
@@ -477,6 +478,7 @@ function _wp_make_subsizes( $new_sizes, $file, $image_meta, $attachment_id ) {
  * Generate attachment meta data and create image sub-sizes for images.
  *
  * @since 2.1.0
+ * @since 6.0.0 The `$filesize` value was added to the returned array.
  *
  * @param int    $attachment_id Attachment ID to process.
  * @param string $file          Filepath of the attached image.
diff --git a/wp-includes/class-wp-image-editor-gd.php b/wp-includes/class-wp-image-editor-gd.php
index 0d2965d925..03525ce943 100644
--- a/wp-includes/class-wp-image-editor-gd.php
+++ b/wp-includes/class-wp-image-editor-gd.php
@@ -425,10 +425,20 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
 	 * @since 3.5.0
 	 * @since 5.9.0 Renamed `$filename` to `$destfilename` to match parent class
 	 *              for PHP 8 named parameter support.
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
 	 *
 	 * @param string|null $destfilename Optional. Destination filename. Default null.
 	 * @param string|null $mime_type    Optional. The mime-type. Default null.
-	 * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string}
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
 	 */
 	public function save( $destfilename = null, $mime_type = null ) {
 		$saved = $this->_save( $this->image, $destfilename, $mime_type );
@@ -442,10 +452,22 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
 	}
 
 	/**
+	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
+	 *
 	 * @param resource|GdImage $image
 	 * @param string|null      $filename
 	 * @param string|null      $mime_type
-	 * @return array|WP_Error
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
 	 */
 	protected function _save( $image, $filename = null, $mime_type = null ) {
 		list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
diff --git a/wp-includes/class-wp-image-editor-imagick.php b/wp-includes/class-wp-image-editor-imagick.php
index 88614fe1ae..f413387233 100644
--- a/wp-includes/class-wp-image-editor-imagick.php
+++ b/wp-includes/class-wp-image-editor-imagick.php
@@ -661,10 +661,20 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 	 * Saves current image to file.
 	 *
 	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
 	 *
 	 * @param string $destfilename Optional. Destination filename. Default null.
 	 * @param string $mime_type    Optional. The mime-type. Default null.
-	 * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string}
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
 	 */
 	public function save( $destfilename = null, $mime_type = null ) {
 		$saved = $this->_save( $this->image, $destfilename, $mime_type );
@@ -684,10 +694,22 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 	}
 
 	/**
+	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
+	 *
 	 * @param Imagick $image
 	 * @param string  $filename
 	 * @param string  $mime_type
-	 * @return array|WP_Error
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
 	 */
 	protected function _save( $image, $filename = null, $mime_type = null ) {
 		list( $filename, $extension, $mime_type ) = $this->get_output_format( $filename, $mime_type );
diff --git a/wp-includes/class-wp-image-editor.php b/wp-includes/class-wp-image-editor.php
index b64ae0be7f..caa3092d36 100644
--- a/wp-includes/class-wp-image-editor.php
+++ b/wp-includes/class-wp-image-editor.php
@@ -75,11 +75,21 @@ abstract class WP_Image_Editor {
 	 * Saves current image to file.
 	 *
 	 * @since 3.5.0
+	 * @since 6.0.0 The `$filesize` value was added to the returned array.
 	 * @abstract
 	 *
 	 * @param string $destfilename Optional. Destination filename. Default null.
 	 * @param string $mime_type    Optional. The mime-type. Default null.
-	 * @return array|WP_Error {'path'=>string, 'file'=>string, 'width'=>int, 'height'=>int, 'mime-type'=>string}
+	 * @return array|WP_Error {
+	 *     Array on success or WP_Error if the file failed to save.
+	 *
+	 *     @type string $path      Path to the image file.
+	 *     @type string $file      Name of the image file.
+	 *     @type int    $width     Image width.
+	 *     @type int    $height    Image height.
+	 *     @type string $mime-type The mime type of the image.
+	 *     @type int    $filesize  File size of the image.
+	 * }
 	 */
 	abstract public function save( $destfilename = null, $mime_type = null );
 
diff --git a/wp-includes/post.php b/wp-includes/post.php
index cbf3e6e59a..23719feadd 100644
--- a/wp-includes/post.php
+++ b/wp-includes/post.php
@@ -6508,6 +6508,7 @@ function wp_delete_attachment_files( $post_id, $meta, $backup_sizes, $file ) {
  * Retrieves attachment metadata for attachment ID.
  *
  * @since 2.1.0
+ * @since 6.0.0 The `$filesize` value was added to the returned array.
  *
  * @param int  $attachment_id Attachment post ID. Defaults to global $post.
  * @param bool $unfiltered    Optional. If true, filters are not run. Default false.
diff --git a/wp-includes/version.php b/wp-includes/version.php
index 9012835eae..b3ab5495f3 100644
--- a/wp-includes/version.php
+++ b/wp-includes/version.php
@@ -16,7 +16,7 @@
  *
  * @global string $wp_version
  */
-$wp_version = '6.1-alpha-53546';
+$wp_version = '6.1-alpha-53547';
 
 /**
  * Holds the WordPress DB revision, increments when changes are made to the WordPress DB schema.