diff --git a/litellm/llms/azure_ai/image_edit/mai_transformation.py b/litellm/llms/azure_ai/image_edit/mai_transformation.py
index ea397f8e3ca..da1da0c6e98 100644
--- a/litellm/llms/azure_ai/image_edit/mai_transformation.py
+++ b/litellm/llms/azure_ai/image_edit/mai_transformation.py
@@ -73,7 +73,7 @@ class AzureFoundryMAIImageEditConfig(OpenAIImageEditConfig):
 
         if "x" in size:
             try:
-                map(int, size.lower().split("x"))
+                tuple(map(int, size.lower().split("x", 1)))
                 return
             except ValueError:
                 raise ValueError(
diff --git a/tests/test_litellm/llms/azure_ai/image_edit/test_mai_image_edit_transformation.py b/tests/test_litellm/llms/azure_ai/image_edit/test_mai_image_edit_transformation.py
index c5183894383..465d11d7448 100644
--- a/tests/test_litellm/llms/azure_ai/image_edit/test_mai_image_edit_transformation.py
+++ b/tests/test_litellm/llms/azure_ai/image_edit/test_mai_image_edit_transformation.py
@@ -80,6 +80,15 @@ class TestAzureMAIImageEdit:
                 drop_params=True,
             )
 
+    def test_map_openai_params_invalid_size_format_raises(self):
+        config = AzureFoundryMAIImageEditConfig()
+        with pytest.raises(ValueError, match="Invalid size format: '1024xabc'"):
+            config.map_openai_params(
+                image_edit_optional_params={"size": "1024xabc"},
+                model="MAI-Image-2.5",
+                drop_params=True,
+            )
+
     def test_transform_image_edit_request_uses_image_field(self):
         config = AzureFoundryMAIImageEditConfig()
         image_bytes = io.BytesIO(b"fake-image-bytes")