How to use size-limit package?

I have installed the npm package size-limit to monitor the size of my application. Following their documentation, I've written this in my package.json:

"scripts": {"size": "size-limit"  },"size-limit": [    {"path": "./src/index.tsx","limit": "120 KB"    }  ],

But when running yarn size I receive the following error:

/bin/sh: size-limit: command not found.

Weird. When directly running yarn size-limit I have:

error Command "size-limit" not found.

How to fix this?