diff --git a/src/wp-includes/class-wp-image-editor-gd.php b/src/wp-includes/class-wp-image-editor-gd.php
index 3d4e89b72a..9951dba0a5 100644
--- a/src/wp-includes/class-wp-image-editor-gd.php
+++ b/src/wp-includes/class-wp-image-editor-gd.php
@@ -219,11 +219,11 @@ class WP_Image_Editor_GD extends WP_Image_Editor {
 	 *     maintain aspect ratio according to the provided dimension.
 	 *
 	 *     @type array $size {
-	 *         Optional. Array of height, width values, and whether to crop.
+	 *         Array of height, width values, and whether to crop.
 	 *
-	 *         @type int  $width  Image width.
-	 *         @type int  $height Image height.
-	 *         @type bool $crop   Whether to crop the image. Default false.
+	 *         @type int  $width  Image width. Optional if `$height` is specified.
+	 *         @type int  $height Image height. Optional if `$width` is specified.
+	 *         @type bool $crop   Optional. Whether to crop the image. Default false.
 	 *     }
 	 * }
 	 * @return array An array of resized images' metadata by size.
diff --git a/src/wp-includes/class-wp-image-editor-imagick.php b/src/wp-includes/class-wp-image-editor-imagick.php
index 4479afc7ab..58338055e2 100644
--- a/src/wp-includes/class-wp-image-editor-imagick.php
+++ b/src/wp-includes/class-wp-image-editor-imagick.php
@@ -277,11 +277,11 @@ class WP_Image_Editor_Imagick extends WP_Image_Editor {
 	 *     maintain aspect ratio according to the provided dimension.
 	 *
 	 *     @type array $size {
-	 *         Optional. Array of height, width values, and whether to crop.
+	 *         Array of height, width values, and whether to crop.
 	 *
-	 *         @type int  $width  Image width.
-	 *         @type int  $height Image height.
-	 *         @type bool $crop   Whether to crop the image. Default false.
+	 *         @type int  $width  Image width. Optional if `$height` is specified.
+	 *         @type int  $height Image height. Optional if `$width` is specified.
+	 *         @type bool $crop   Optional. Whether to crop the image. Default false.
 	 *     }
 	 * }
 	 * @return array An array of resized images' metadata by size.