diff --git a/lib/helpers/wp-cli-db/class-wp-cli-db.php b/lib/helpers/wp-cli-db/class-wp-cli-db.php
index 8be564c820..77f0587413 100644
--- a/lib/helpers/wp-cli-db/class-wp-cli-db.php
+++ b/lib/helpers/wp-cli-db/class-wp-cli-db.php
@@ -49,7 +49,6 @@ public function validate_subcommand( array $command ) {
 			'query',
 			'prefix',
 			'columns',
-			'size',
 			'tables',
 		];