diff --git a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
index c82257f..371bc68 100644
--- a/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
+++ b/core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/EmailDefaultWidget.php
@@ -39,6 +39,13 @@ public static function defaultSettings() {
    * {@inheritdoc}
    */
   public function settingsForm(array $form, FormStateInterface $form_state) {
+    $element['size'] = array(
+      '#type' => 'number',
+      '#title' => $this->t('Size of the input field'),
+      '#default_value' => $this->getSetting('size'),
+      '#required' => TRUE,
+      '#min' => 1,
+    );
     $element['placeholder'] = array(
       '#type' => 'textfield',
       '#title' => t('Placeholder'),