diff --git a/README.md b/README.md
index 44ffccfb..6ce09c8a 100644
--- a/README.md
+++ b/README.md
@@ -1,6 +1,7 @@
 
 [![License: MIT](https://img.shields.io/badge/license-MIT-green.svg)](https://github.com/RobTillaart/Arduino/blob/master/LICENSE)
 [![GitHub release](https://img.shields.io/github/release/RobTillaart/Arduino.svg?maxAge=3600)](https://github.com/RobTillaart/Arduino/releases)
+![code size:](https://img.shields.io/github/languages/code-size/RobTillaart/Arduino)
 
 # Arduino libraries