diff --git a/package.json b/package.json
index 7c5cf634..d778b731 100644
--- a/package.json
+++ b/package.json
@@ -50,6 +50,7 @@
     "cleanup": "node ./bin/cleanup.js",
     "debug": "DEBUG=* electron .",
     "package": "npm prune && npm dedupe && node ./bin/package.js",
+    "size": "npm run package -- --darwin && du -ch dist/WebTorrent-darwin-x64 | grep total",
     "start": "electron .",
     "test": "standard",
     "update-authors": "./bin/update-authors.sh"