diff --git a/View/Helper/BackToHelper.php b/View/Helper/BackToHelper.php
index 2943e1a9..1b3492cb 100644
--- a/View/Helper/BackToHelper.php
+++ b/View/Helper/BackToHelper.php
@@ -64,7 +64,7 @@ public function button($title, $url, $options = array()) {
 
 		$defaultOptions = array(
 			'type' => 'button',
-			'class' => 'btn btn-default btn-workflow',
+			'class' => 'btn btn-default btn-workflow ' . $sizeAttr,
 			'ng-disabled' => 'sending',
 		);
 		if ($url) {