diff --git a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
index 46e96c9a88..f75afab3cf 100644
--- a/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
+++ b/core/lib/Drupal/Core/Entity/Sql/SqlContentEntityStorageSchema.php
@@ -2248,9 +2248,12 @@ protected function getDedicatedTableSchema(FieldStorageDefinitionInterface $stor
       ];
     }
     else {
+      $id_settings = $id_definition->getSettings();
+      $max_length = array_key_exists('max_length', $id_settings) ? $id_settings['max_length'] : 128;
+      $is_ascii = array_key_exists('is_ascii', $id_settings) ? $id_settings['is_ascii'] : TRUE;
       $id_schema = [
-        'type' => 'varchar_ascii',
-        'length' => 128,
+        'type' => $is_ascii ? 'varchar_ascii' : 'varchar',
+        'length' => $max_length,
         'not null' => TRUE,
         'description' => 'The entity id this data is attached to',
       ];
diff --git a/core/tests/Drupal/Tests/Core/Field/TestBaseFieldDefinitionInterface.php b/core/tests/Drupal/Tests/Core/Field/TestBaseFieldDefinitionInterface.php
index 953c90209f..33e055f00e 100644
--- a/core/tests/Drupal/Tests/Core/Field/TestBaseFieldDefinitionInterface.php
+++ b/core/tests/Drupal/Tests/Core/Field/TestBaseFieldDefinitionInterface.php
@@ -9,4 +9,7 @@
  * Defines a test interface to mock entity base field definitions.
  */
 interface TestBaseFieldDefinitionInterface extends FieldDefinitionInterface, FieldStorageDefinitionInterface {
+
+  public function getSettings(): array;
+
 }