diff --git a/enstools/encoding/chunk_size.py b/enstools/encoding/chunk_size.py
new file mode 100644
index 0000000000000000000000000000000000000000..ae859fb182dd4bd6463ab9f49b1dcac556479b54
--- /dev/null
+++ b/enstools/encoding/chunk_size.py
@@ -0,0 +1,12 @@
+# Using a module file to store the desired chunk size.
+chunk_size = "10MB"
+
+def change_chunk_size(new_chunk_size: str):
+    global chunk_size
+    chunk_size = new_chunk_size
+
+# This variable will be used in many places.
+# One can modify this variable directly assigning a new value
+# enstools.encoding.chunk_size.chunk_size = "1MB"
+# or using the function change_chunk_size("1MB")
+