diff --git a/atlas/migrations/0065_series_total_image_size.py b/atlas/migrations/0065_series_total_image_size.py
new file mode 100644
index 00000000..f9a4b4b7
--- /dev/null
+++ b/atlas/migrations/0065_series_total_image_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.2 on 2024-12-18 23:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('atlas', '0064_casecollection_exam_open_access'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='series',
+            name='total_image_size',
+            field=models.BigIntegerField(blank=True, help_text='Stores a (cached) total size of images within the series', null=True),
+        ),
+    ]
diff --git a/atlas/migrations/0066_case_total_images_series_size.py b/atlas/migrations/0066_case_total_images_series_size.py
new file mode 100644
index 00000000..d9c40c15
--- /dev/null
+++ b/atlas/migrations/0066_case_total_images_series_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.2 on 2024-12-18 23:59
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('atlas', '0065_series_total_image_size'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='case',
+            name='total_images_series_size',
+            field=models.BigIntegerField(blank=True, null=True),
+        ),
+    ]
diff --git a/atlas/models.py b/atlas/models.py
index edb848a1..80adf126 100644
--- a/atlas/models.py
+++ b/atlas/models.py
@@ -390,6 +390,8 @@ class Case(models.Model, AuthorMixin, QuestionMixin):
 
     resource = models.ManyToManyField("Resource", through="CaseResource")
 
+    total_images_series_size = models.BigIntegerField(null=True, blank=True)
+
     def get_app_name(self):
         return "atlas"
 
@@ -495,6 +497,17 @@ class Case(models.Model, AuthorMixin, QuestionMixin):
     def get_series(self):
         return self.series.all().prefetch_related("images", "examination", "plane")
 
+    def get_total_series_images_size(self, refresh=False):
+        if self.total_images_series_size is not None and not refresh:
+            return self.total_images_series_size
+
+        series = self.series.all()
+        size = sum(s.get_total_image_size(refresh=refresh) for s in series)
+
+        return size
+
+
+
 
 def extract_image_dicom_json_from_ds(ds, url, image_index):
     to_keep = [
diff --git a/atlas/templates/atlas/case_display_block.html b/atlas/templates/atlas/case_display_block.html
index c60420e7..7436858f 100755
--- a/atlas/templates/atlas/case_display_block.html
+++ b/atlas/templates/atlas/case_display_block.html
@@ -188,3 +188,6 @@
 
     <p><b>Author(s):</b> {% for author in case.author.all %} <a
         href="{% url 'atlas:author_detail' pk=author.pk %}">{{author}}</a>, {% endfor %}</p>
+
+
+    <p><b>Case size:</b> {{ case.get_total_series_images_size | filesizeformat }}</p>
diff --git a/generic/models.py b/generic/models.py
index fe990d3d..d21dfb8c 100644
--- a/generic/models.py
+++ b/generic/models.py
@@ -336,6 +336,8 @@ class SeriesBase(models.Model):
         choices=SeriesModifiedChocies.choices,
     )
 
+    total_image_size = models.BigIntegerField(null=True, blank=True, help_text="Stores a (cached) total size of images within the series")
+
     class Meta:
         abstract = True
 
@@ -531,7 +533,14 @@ class SeriesBase(models.Model):
             i.save()
             n = n + 1
 
-    def get_total_image_size(self):
+    def get_total_image_size(self, refresh=False):
+        """Returns the total size of all images in the series.
+        
+        If refresh is set to True the size will be recalculated and saved to the database
+        (in the field 'total_image_size')."""
+        if not refresh and self.total_image_size:
+            return self.total_image_size
+
         images = self.images.filter(removed=False)
 
         size = 0
@@ -539,6 +548,9 @@ class SeriesBase(models.Model):
         for i in images:
             size += i.get_file_size()
 
+        self.total_image_size = size
+        self.save()
+
         return size
 
     def anonymise_images(self):
diff --git a/longs/migrations/0032_longseries_total_image_size.py b/longs/migrations/0032_longseries_total_image_size.py
new file mode 100644
index 00000000..48c4f869
--- /dev/null
+++ b/longs/migrations/0032_longseries_total_image_size.py
@@ -0,0 +1,18 @@
+# Generated by Django 5.0.2 on 2024-12-18 23:32
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('longs', '0031_exam_results_supervisor_visible'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='longseries',
+            name='total_image_size',
+            field=models.BigIntegerField(blank=True, help_text='Stores a (cached) total size of images within the series', null=True),
+        ),
+    ]