diff --git a/catalog/dags/providers/provider_api_scripts/science_museum.py b/catalog/dags/providers/provider_api_scripts/science_museum.py
index 02fc9d56c7..b3e87f1bff 100644
--- a/catalog/dags/providers/provider_api_scripts/science_museum.py
+++ b/catalog/dags/providers/provider_api_scripts/science_museum.py
@@ -130,6 +130,7 @@ def get_record_data(self, record):
                 height,
                 width,
                 filetype,
+                filesize,
             ) = self._get_image_info(processed)
             if not url:
                 continue
@@ -144,6 +145,7 @@ def get_record_data(self, record):
                 "height": height,
                 "width": width,
                 "filetype": filetype,
+                "filesize": filesize,
                 "license_info": license_info,
                 "creator": creator,
                 "title": title,
@@ -187,15 +189,25 @@ def _get_dimensions(image_data: dict) -> tuple[int | None, int | None]:
     @staticmethod
     def _get_image_info(
         processed: dict,
-    ) -> tuple[str | None, int | None, int | None, str | None]:
-        height, width, filetype = None, None, None
+    ) -> tuple[str | None, int | None, int | None, str | None, int | None]:
+        height, width, filetype, filesize = None, None, None, None
         image_data = processed.get("large") or processed.get("medium", {})
 
         url = ScienceMuseumDataIngester.check_url(image_data.get("location"))
         if url:
             filetype = image_data.get("format")
             height, width = ScienceMuseumDataIngester._get_dimensions(image_data)
-        return url, height, width, filetype
+
+            if not (
+                filesize := int(
+                    image_data.get("measurements", {})
+                    .get("filesize", {})
+                    .get("value", 0)
+                )
+            ):
+                filesize = None
+
+        return url, height, width, filetype, filesize
 
     @staticmethod
     def _get_first_list_value(key: str, attributes: dict) -> str | None:
diff --git a/catalog/tests/dags/providers/provider_api_scripts/test_science_museum.py b/catalog/tests/dags/providers/provider_api_scripts/test_science_museum.py
index 8970aec52b..b4aef97359 100644
--- a/catalog/tests/dags/providers/provider_api_scripts/test_science_museum.py
+++ b/catalog/tests/dags/providers/provider_api_scripts/test_science_museum.py
@@ -176,6 +176,7 @@ def test_get_record_data_success(object_data):
         "height": 1150,
         "width": 1536,
         "filetype": "jpeg",
+        "filesize": 134947,
         "license_info": BY_SA_4_0,
         "creator": "Unknown maker",
         "title": "Small votive organ of unknown type",
@@ -216,8 +217,8 @@ def test_creator_info_fail(object_data):
 
 def test_image_info_large():
     large_image = _get_resource_json("large_image.json")
-    actual_image, actual_height, actual_width, actual_filetype = sm._get_image_info(
-        large_image
+    actual_image, actual_height, actual_width, actual_filetype, actual_filesize = (
+        sm._get_image_info(large_image)
     )
     expected_image = (
         "https://coimages.sciencemuseumgroup.org.uk/3/563/"
@@ -226,17 +227,19 @@ def test_image_info_large():
     expected_height = 1022
     expected_width = 1536
     expected_filetype = "jpeg"
+    expected_filesize = 58772
 
     assert actual_image == expected_image
     assert actual_height == expected_height
     assert actual_width == expected_width
     assert actual_filetype == expected_filetype
+    assert actual_filesize == expected_filesize
 
 
 def test_image_info_medium():
     medium_image = _get_resource_json("medium_image.json")
-    actual_url, actual_height, actual_width, actual_filetype = sm._get_image_info(
-        medium_image
+    actual_url, actual_height, actual_width, actual_filetype, actual_filesize = (
+        sm._get_image_info(medium_image)
     )
 
     expected_image = (
@@ -250,15 +253,19 @@ def test_image_info_medium():
     assert actual_height == expected_height
     assert actual_width == expected_width
     assert actual_filetype == "jpeg"
+    assert actual_filesize is None
 
 
 def test_image_info_failure():
-    actual_url, actual_height, actual_width, actual_filetype = sm._get_image_info({})
+    actual_url, actual_height, actual_width, actual_filetype, actual_filesize = (
+        sm._get_image_info({})
+    )
 
     assert actual_url is None
     assert actual_height is None
     assert actual_width is None
     assert actual_filetype is None
+    assert actual_filesize is None
 
 
 def test_check_relative_url():