diff --git a/edit_form.php b/edit_form.php
index c0721f4..7a59c15 100644
--- a/edit_form.php
+++ b/edit_form.php
@@ -212,11 +212,13 @@ class mod_customcert_edit_form extends moodleform {
 
         $mform->addElement('text', 'width_' . $pageid, get_string('width', 'customcert'));
         $mform->setType('width_' . $pageid, PARAM_INT);
+        $mform->setDefault('width_' . $pageid, '210');
         $mform->addRule('width_' . $pageid, null, 'required', null, 'client');
         $mform->addHelpButton('width_' . $pageid, 'width', 'customcert');
 
         $mform->addElement('text', 'height_' . $pageid, get_string('height', 'customcert'));
         $mform->setType('height_' . $pageid, PARAM_INT);
+        $mform->setDefault('height_' . $pageid, '297');
         $mform->addRule('height_' . $pageid, null, 'required', null, 'client');
         $mform->addHelpButton('height_' . $pageid, 'height', 'customcert');
 
diff --git a/lib.php b/lib.php
index 7a242e1..edf2ccb 100644
--- a/lib.php
+++ b/lib.php
@@ -558,6 +558,8 @@ function customcert_add_page($data) {
     $page = new stdClass();
     $page->customcertid = $data->id;
     $page->orientation = 'P';
+    $page->width = '210';
+    $page->height = '297';
     $page->pagenumber = $pagenum;
     $page->timecreated = $time;
     $page->timemodified = $time;