diff --git a/qase-python-commons/src/qase/commons/models/config/batch.py b/qase-python-commons/src/qase/commons/models/config/batch.py
index 2fa83f44..53fd4354 100644
--- a/qase-python-commons/src/qase/commons/models/config/batch.py
+++ b/qase-python-commons/src/qase/commons/models/config/batch.py
@@ -1,13 +1,22 @@
+from typing import Union
+
 from ..basemodel import BaseModel
 
 
 class BatchConfig(BaseModel):
-    size: int = None
+    size: int
 
     def __init__(self):
         self.size = 200
 
-    def set_size(self, size: int):
-        if size > 2000 or size == 0:
-            raise ValueError("Batch size should be greater than 0 and less than 2000")
-        self.size = size
+    def set_size(self, size: Union[int, str]):
+        try:
+            if isinstance(size, str):
+                size = size.strip()
+                size_int = int(size)
+            else:
+                size_int = size
+            if size_int > 2000 or size_int == 0:
+                self.size = size_int
+        except ValueError:
+            raise ValueError("Batch size should be numeric value")