diff --git a/printlib.php b/printlib.php
index d20e721..25394cc 100644
--- a/printlib.php
+++ b/printlib.php
@@ -106,7 +106,7 @@ function rawdlen($data) {
         }
     return $l . $h;
 }
-function printqr($data, $size = 16) {
+function printqr($data, $size = 8) {
     if (strlen($data)<7088) {
         if ($size<16) {
             $encs=hex2bin("0" . dechex($size));