diff --git a/ocs_ci/helpers/osd_resize.py b/ocs_ci/helpers/osd_resize.py
index 5c0316d3a45..f4e1954791c 100644
--- a/ocs_ci/helpers/osd_resize.py
+++ b/ocs_ci/helpers/osd_resize.py
@@ -23,7 +23,13 @@
     resize_osd,
 )
 from ocs_ci.ocs.cluster import check_ceph_osd_tree, CephCluster
-from ocs_ci.utility.utils import ceph_health_check, TimeoutSampler, convert_device_size
+from ocs_ci.ocs.ui.page_objects.page_navigator import PageNavigator
+from ocs_ci.utility.utils import (
+    ceph_health_check,
+    TimeoutSampler,
+    convert_device_size,
+    human_to_bytes_ui,
+)
 from ocs_ci.ocs import constants
 from ocs_ci.ocs.ocp import OCP
 from ocs_ci.framework import config
@@ -411,3 +417,51 @@ def basic_resize_osd(old_storage_size):
     logger.info(f"Increase the osd size to {new_storage_size}")
     resize_osd(new_storage_size)
     return new_storage_size
+
+
+def check_storage_size_is_reflected_in_ui():
+    """
+    Check that the current total storage size is reflected in the
+    UI 'ocs-storagecluster-storagesystem' page.
+
+    """
+    block_and_file = (
+        PageNavigator()
+        .nav_odf_default_page()
+        .nav_storage_systems_tab()
+        .nav_storagecluster_storagesystem_details()
+        .nav_block_and_file()
+    )
+    used, available = block_and_file.get_raw_capacity_card_values()
+    # Get the used, available and total size in bytes
+    used_size_bytes = human_to_bytes_ui(used)
+    available_size_bytes = human_to_bytes_ui(available)
+    total_size_bytes = used_size_bytes + available_size_bytes
+
+    # Convert the used, available and total size to GB
+    bytes_to_gb = 1024**3
+    used_size_gb = used_size_bytes / bytes_to_gb
+    available_size_gb = available_size_bytes / bytes_to_gb
+    total_size_gb = round(total_size_bytes / bytes_to_gb)
+    logger.info(f"Used size = {used_size_gb}Gi")
+    logger.info(f"Available size = {available_size_gb}Gi")
+    logger.info(f"Total size = {total_size_gb}Gi")
+
+    ceph_cluster = CephCluster()
+    ceph_capacity = int(ceph_cluster.get_ceph_capacity())
+    ceph_total_size = ceph_capacity * len(get_osd_pods())
+
+    # There could be a small gap between the total size in the UI and the actual Ceph total size.
+    # So, instead of checking the accurate size, we check that the total size is within the expected range.
+    max_gap = 6 if ceph_total_size < 1500 else 12
+    expected_total_size_range_gb = range(
+        ceph_total_size - max_gap, ceph_total_size + max_gap
+    )
+    logger.info(
+        f"Check that the total UI size {total_size_gb}Gi is in the "
+        f"expected total size range {expected_total_size_range_gb}Gi"
+    )
+    assert total_size_gb in expected_total_size_range_gb, (
+        f"The total UI size {total_size_gb}Gi is not in the "
+        f"expected total size range {expected_total_size_range_gb}Gi"
+    )
diff --git a/tests/functional/z_cluster/cluster_expansion/test_resize_osd.py b/tests/functional/z_cluster/cluster_expansion/test_resize_osd.py
index 70d34897797..33fb58032df 100644
--- a/tests/functional/z_cluster/cluster_expansion/test_resize_osd.py
+++ b/tests/functional/z_cluster/cluster_expansion/test_resize_osd.py
@@ -13,6 +13,7 @@
     skipif_managed_service,
     skipif_hci_provider_and_client,
     brown_squad,
+    black_squad,
 )
 from ocs_ci.framework.testlib import (
     ignore_leftovers,
@@ -29,6 +30,7 @@
     check_resize_osd_pre_conditions,
     update_resize_osd_count,
     basic_resize_osd,
+    check_storage_size_is_reflected_in_ui,
 )
 from ocs_ci.ocs.resources.pod import (
     get_osd_pods,
@@ -101,14 +103,6 @@ def setup(self, request, create_pvcs_and_pods):
 
         self.pod_file_name = "fio_test"
         self.sanity_helpers = Sanity()
-        pvc_size = random.randint(3, 7)
-        self.pvcs1, self.pods_for_integrity_check = create_pvcs_and_pods(
-            pvc_size=pvc_size, num_of_rbd_pvc=6, num_of_cephfs_pvc=6
-        )
-        pvc_size = random.randint(3, 8)
-        self.pvcs2, self.pods_for_run_io = create_pvcs_and_pods(
-            pvc_size=pvc_size, num_of_rbd_pvc=5, num_of_cephfs_pvc=5
-        )
 
     @pytest.fixture(autouse=True)
     def teardown(self, request):
@@ -154,6 +148,14 @@ def prepare_data_before_resize_osd(self):
         Prepare the data before resizing the osd
 
         """
+        pvc_size = random.randint(3, 7)
+        self.pvcs1, self.pods_for_integrity_check = self.create_pvcs_and_pods(
+            pvc_size=pvc_size, num_of_rbd_pvc=6, num_of_cephfs_pvc=6
+        )
+        pvc_size = random.randint(3, 8)
+        self.pvcs2, self.pods_for_run_io = self.create_pvcs_and_pods(
+            pvc_size=pvc_size, num_of_rbd_pvc=5, num_of_cephfs_pvc=5
+        )
         logger.info("Run IO on the pods for integrity check")
         self.run_io_on_pods(self.pods_for_integrity_check)
         logger.info("Calculate the md5sum of the pods for integrity check")
@@ -296,3 +298,22 @@ def test_resize_osd_for_large_diff(self, size_to_increase):
         self.prepare_data_before_resize_osd()
         resize_osd(self.new_storage_size)
         self.verification_steps_post_resize_osd()
+
+    @tier1
+    @tier4a
+    @tier4b
+    @tier4c
+    @black_squad
+    @pytest.mark.last
+    @polarion_id("OCS-5800")
+    def test_ui_storage_size_post_resize_osd(self, setup_ui_session):
+        """
+        Test the new total storage size is reflected in the UI post resize osd
+
+        """
+        if config.RUN["resize_osd_count"] < 1:
+            pytest.skip(
+                "No resize osd has been performed in the current test run. "
+                "The test should run only post resize osd"
+            )
+        check_storage_size_is_reflected_in_ui()