diff --git a/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st
new file mode 100644
index 00000000..f7139913
--- /dev/null
+++ b/repository/Grease-Pharo70-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st
@@ -0,0 +1,4 @@
+files
+sizeOfFile: aString
+
+	^ aString asFileReference size
\ No newline at end of file
diff --git a/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st
new file mode 100644
index 00000000..f7139913
--- /dev/null
+++ b/repository/Grease-Pharo90-Core.package/GRPharoPlatform.class/instance/sizeOfFile..st
@@ -0,0 +1,4 @@
+files
+sizeOfFile: aString
+
+	^ aString asFileReference size
\ No newline at end of file