diff --git a/mapchete/cli/mpath.py b/mapchete/cli/mpath.py
index c7f92df4..a32cfa46 100644
--- a/mapchete/cli/mpath.py
+++ b/mapchete/cli/mpath.py
@@ -6,7 +6,6 @@
 from mapchete.cli import options
 from mapchete.io import copy
 from mapchete.path import MPath
-from mapchete.pretty import pretty_bytes
 
 opt_recursive = click.option("--recursive", "-r", is_flag=True)
 
@@ -79,9 +78,11 @@ def _print_rows(
                     columns=[
                         "",
                         "",
-                        f"{str(subpath)}/"
-                        if absolute_paths
-                        else f"{subpath.relative_to(path)}/",
+                        (
+                            f"{str(subpath)}/"
+                            if absolute_paths
+                            else f"{subpath.relative_to(path)}/"
+                        ),
                     ],
                     widths=[last_modified_column_width, size_column_width, None],
                     spacing=spacing,
@@ -92,7 +93,7 @@ def _print_rows(
                 _row(
                     columns=[
                         subpath.last_modified().strftime(date_format),
-                        pretty_bytes(subpath.size()),
+                        subpath.pretty_size(),
                         str(subpath) if absolute_paths else subpath.relative_to(path),
                     ],
                     widths=[last_modified_column_width, size_column_width, None],
diff --git a/mapchete/path.py b/mapchete/path.py
index f31d1d35..1d705684 100644
--- a/mapchete/path.py
+++ b/mapchete/path.py
@@ -22,6 +22,7 @@
 from retry import retry
 
 from mapchete.executor import Executor
+from mapchete.pretty import pretty_bytes
 from mapchete.settings import GDALHTTPOptions, IORetrySettings, mapchete_options
 from mapchete.tile import BufferedTile
 from mapchete.types import MPathLike
@@ -442,6 +443,9 @@ def rm(self, recursive: bool = False, ignore_errors: bool = False) -> None:
     def size(self) -> int:
         return self.info().get("size", self.info().get("Size"))
 
+    def pretty_size(self) -> str:
+        return pretty_bytes(self.size())
+
     def last_modified(self) -> datetime:
         # for S3 objects
         last_modified = self.info().get("LastModified")
diff --git a/test/test_path.py b/test/test_path.py
index 2121b63b..2a0b769d 100644
--- a/test/test_path.py
+++ b/test/test_path.py
@@ -287,6 +287,16 @@ def test_size_remote(path):
     test_size(path)
 
 
+@pytest.mark.parametrize(
+    "path",
+    [
+        lazy_fixture("metadata_json"),
+    ],
+)
+def test_pretty_size(path):
+    assert path.pretty_size()
+
+
 @pytest.mark.parametrize(
     "path",
     [