diff --git a/python_boilerplate/demo/python_dependency_size.py b/python_boilerplate/demo/python_dependency_size.py
new file mode 100644
index 0000000..30c2544
--- /dev/null
+++ b/python_boilerplate/demo/python_dependency_size.py
@@ -0,0 +1,39 @@
+from importlib import metadata as importlib_metadata
+from importlib.metadata import Distribution, PackagePath
+from pathlib import Path
+
+from loguru import logger
+
+
+def calculate_distribution(dist: Distribution) -> int:
+    # noinspection PyUnresolvedReferences,PyProtectedMember
+    distribution_parent: Path = dist._path.parent  # type: ignore
+    files_in_distribution: list[PackagePath] = (
+        dist.files if dist.files is not None else []
+    )
+    total_size = 0
+    logger.debug(f"{dist.metadata['name']} has {len(files_in_distribution)} files")
+    for file in files_in_distribution:
+        file_path = distribution_parent / str(file)
+        if file_path.is_file():
+            total_size += file_path.stat().st_size
+    return total_size
+
+
+def list_python_dependencies() -> None:
+    distributions = list(importlib_metadata.distributions())
+    logger.info(f"Size of dists: {len(distributions)}")
+    total_size = 0
+    for dist in distributions:
+        size = calculate_distribution(dist)
+        total_size += size
+        if size / 1000 > 1.0:
+            logger.info(f"{dist.metadata['name']}: {size / 1000} KB")
+        else:
+            logger.info(f"{dist.metadata['name']}: {size} B")
+        logger.info("-" * 40)
+    logger.info(f"Total dependency size: {total_size / 1000} KB")
+
+
+if __name__ == "__main__":
+    list_python_dependencies()
diff --git a/tests/demo/test_python_dependency_size.py b/tests/demo/test_python_dependency_size.py
new file mode 100644
index 0000000..472b91a
--- /dev/null
+++ b/tests/demo/test_python_dependency_size.py
@@ -0,0 +1,8 @@
+from python_boilerplate.demo.python_dependency_size import list_python_dependencies
+
+
+def test_list_python_dependencies() -> None:
+    try:
+        list_python_dependencies()
+    except Exception as e:
+        assert False, f"Failed to test throttle_function(). {e}"