diff --git a/.changes/add-fs-size.md b/.changes/add-fs-size.md
new file mode 100644
index 00000000..1637e972
--- /dev/null
+++ b/.changes/add-fs-size.md
@@ -0,0 +1,6 @@
+---
+fs: minor
+persisted-scope: minor
+---
+
+**Breaking Change:** add the `size` method to get the size of a file or directory.