diff --git a/src/apps/api/serializers/datasets.py b/src/apps/api/serializers/datasets.py
index 127f97478..110aba43f 100644
--- a/src/apps/api/serializers/datasets.py
+++ b/src/apps/api/serializers/datasets.py
@@ -78,8 +78,15 @@ class DataDetailSerializer(serializers.ModelSerializer):
     created_by = serializers.CharField(source='created_by.username', read_only=True)
     owner_display_name = serializers.SerializerMethodField()
     competition = serializers.SerializerMethodField()
+    file_size = serializers.SerializerMethodField()
     value = serializers.CharField(source='key', required=False)
 
+    # These fields will be conditionally returned for type == SUBMISSION only
+    submission_file_size = serializers.SerializerMethodField()
+    prediction_result_file_size = serializers.SerializerMethodField()
+    scoring_result_file_size = serializers.SerializerMethodField()
+    detailed_result_file_size = serializers.SerializerMethodField()
+
     class Meta:
         model = Data
         fields = (
@@ -96,11 +103,72 @@ class Meta:
             'value',
             'was_created_by_competition',
             'in_use',
-            'file_size',
             'competition',
             'file_name',
+            'file_size',
+            'submission_file_size',
+            'prediction_result_file_size',
+            'scoring_result_file_size',
+            'detailed_result_file_size',
         )
 
+    def to_representation(self, instance):
+        """
+        Called automatically by DRF when serializing a model instance to JSON.
+
+        This method customizes the serialized output of the DataDetailSerializer.
+        Specifically, it removes detailed file size fields when the data type is not 'SUBMISSION'.
+
+        Example: For input_data or scoring_program types, submission-related fields
+        are not relevant and will be excluded from the output.
+        """
+        # First, generate the default serialized representation using the parent method
+        rep = super().to_representation(instance)
+
+        # If this data object is NOT of type 'submission', remove the following fields
+        if instance.type != Data.SUBMISSION:
+            # These fields are only meaningful for submission-type data
+            rep.pop('submission_file_size', None)
+            rep.pop('prediction_result_file_size', None)
+            rep.pop('scoring_result_file_size', None)
+            rep.pop('detailed_result_file_size', None)
+
+        # Return the final customized representation
+        return rep
+
+    def get_file_size(self, obj):
+        # Check if the data object is of type 'SUBMISSION'
+        if obj.type == Data.SUBMISSION:
+            # Start with the base file size of the data file itself (if present)
+            total_size = obj.file_size or 0
+
+            # Loop through all submissions that use this data
+            for submission in obj.submission.all():
+                # Add the size of the prediction result file (if any)
+                total_size += submission.prediction_result_file_size or 0
+                # Add the size of the scoring result file (if any)
+                total_size += submission.scoring_result_file_size or 0
+                # Add the size of the detailed result file (if any)
+                total_size += submission.detailed_result_file_size or 0
+
+            # Return the combined size of data file and all associated result files
+            return total_size
+
+        # For non-submission data types, just return the file size as-is
+        return obj.file_size
+
+    def get_submission_file_size(self, obj):
+        return obj.file_size or 0
+
+    def get_prediction_result_file_size(self, obj):
+        return sum([s.prediction_result_file_size or 0 for s in obj.submission.all()])
+
+    def get_scoring_result_file_size(self, obj):
+        return sum([s.scoring_result_file_size or 0 for s in obj.submission.all()])
+
+    def get_detailed_result_file_size(self, obj):
+        return sum([s.detailed_result_file_size or 0 for s in obj.submission.all()])
+
     def get_competition(self, obj):
         if obj.competition:
             # Submission
diff --git a/src/apps/api/views/datasets.py b/src/apps/api/views/datasets.py
index dade6bff9..8618af38e 100644
--- a/src/apps/api/views/datasets.py
+++ b/src/apps/api/views/datasets.py
@@ -52,8 +52,15 @@ def get_queryset(self):
 
             # filter datasets and programs
             if is_dataset:
-                qs = qs.filter(~Q(type=Data.SUBMISSION))
-                qs = qs.exclude(Q(type=Data.COMPETITION_BUNDLE))
+                qs = qs.filter(type__in=[
+                    Data.INPUT_DATA,
+                    Data.PUBLIC_DATA,
+                    Data.REFERENCE_DATA,
+                    Data.INGESTION_PROGRAM,
+                    Data.SCORING_PROGRAM,
+                    Data.STARTING_KIT,
+                    Data.SOLUTION
+                ])
 
             # filter bundles
             if is_bundle:
diff --git a/src/static/riot/submissions/resource_submissions.tag b/src/static/riot/submissions/resource_submissions.tag
index 7fb10942e..f88983abd 100644
--- a/src/static/riot/submissions/resource_submissions.tag
+++ b/src/static/riot/submissions/resource_submissions.tag
@@ -125,6 +125,31 @@
                     {selected_row.description}
                 </div>
             </virtual>
+            <table class="ui compact basic table">
+                <thead>
+                <tr>
+                    <th colspan=2>File Sizes</th>
+                </tr>
+                </thead>
+                <tbody>
+                <tr>
+                    <td style="width: 180px;">Submission:</td>
+                    <td>{pretty_bytes(selected_row.submission_file_size)}</td>
+                </tr>
+                <tr>
+                    <td>Prediction result:</td>
+                    <td>{pretty_bytes(selected_row.prediction_result_file_size)}</td>
+                </tr>
+                <tr>
+                    <td>Scoring result:</td>
+                    <td>{pretty_bytes(selected_row.scoring_result_file_size)}</td>
+                </tr>
+                <tr>
+                    <td>Detailed result:</td>
+                    <td>{pretty_bytes(selected_row.detailed_result_file_size)}</td>
+                </tr>
+                </tbody>
+            </table>
         </div>
         <div class="actions">
             <button show="{selected_row.created_by === CODALAB.state.user.username}"