diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
index af3c80a9b0..c8a28bf777 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EntityReferenceAutocompleteWidget.php
@@ -29,7 +29,7 @@ public static function defaultSettings() {
     return [
       'match_operator' => 'CONTAINS',
       'match_limit' => 10,
-      'size' => 60,
+      'size' => '60',
       'placeholder' => '',
     ] + parent::defaultSettings();
   }
diff --git a/core/modules/jsonapi/tests/src/Functional/EntityFormDisplayTest.php b/core/modules/jsonapi/tests/src/Functional/EntityFormDisplayTest.php
index f29372449e..73190d2655 100644
--- a/core/modules/jsonapi/tests/src/Functional/EntityFormDisplayTest.php
+++ b/core/modules/jsonapi/tests/src/Functional/EntityFormDisplayTest.php
@@ -138,8 +138,8 @@ protected function getExpectedDocument() {
               'type' => 'entity_reference_autocomplete',
               'weight' => 5,
               'settings' => [
-                'match_limit' => 10,
                 'match_operator' => 'CONTAINS',
+                'match_limit' => 10,
                 'size' => 60,
                 'placeholder' => '',
               ],