diff --git a/sizes-es.json b/sizes-es.json
new file mode 100644
index 0000000..911a72f
--- /dev/null
+++ b/sizes-es.json
@@ -0,0 +1,12 @@
+[
+  {
+    "timestamp": 1575331668355,
+    "files": [
+      {
+        "filename": "index.es.js",
+        "size": 20365,
+        "delta": 20365
+      }
+    ]
+  }
+]
\ No newline at end of file