diff --git a/localstack-core/localstack/services/events/provider.py b/localstack-core/localstack/services/events/provider.py
index 8dc1ca11d47e5..3a9609d40d42d 100644
--- a/localstack-core/localstack/services/events/provider.py
+++ b/localstack-core/localstack/services/events/provider.py
@@ -197,6 +197,8 @@ def validate_event(event: PutEventsRequestEntry) -> None | PutEventsResultEntry:
             "ErrorCode": "InvalidArgument",
             "ErrorMessage": "Parameter Detail is not valid. Reason: Detail is a required argument.",
         }
+    elif event.get("Detail") and len(event["Detail"]) >= 262144:
+        raise ValidationException("Total size of the entries in the request is over the limit.")
 
 
 def check_unique_tags(tags: TagsList) -> None:
diff --git a/tests/aws/services/events/test_events.py b/tests/aws/services/events/test_events.py
index 35f0aa7696e89..990f972378a6e 100644
--- a/tests/aws/services/events/test_events.py
+++ b/tests/aws/services/events/test_events.py
@@ -118,6 +118,24 @@ def test_put_event_without_detail(self, snapshot, aws_client):
         response = aws_client.events.put_events(Entries=entries)
         snapshot.match("put-events", response)
 
+    @markers.aws.validated
+    @pytest.mark.skipif(
+        is_old_provider(),
+        reason="V1 provider does not support this feature",
+    )
+    def test_put_event_with_too_big_detail(self, snapshot, aws_client):
+        entries = [
+            {
+                "Source": TEST_EVENT_PATTERN_NO_DETAIL["source"][0],
+                "DetailType": TEST_EVENT_PATTERN_NO_DETAIL["detail-type"][0],
+                "Detail": json.dumps({"payload": ["p" * (256 * 1024 - 17)]}),
+            },
+        ]
+
+        with pytest.raises(ClientError) as e:
+            aws_client.events.put_events(Entries=entries)
+        snapshot.match("put-events-too-big-detail-error", e.value.response)
+
     @markers.aws.validated
     @pytest.mark.skipif(
         is_old_provider(),
diff --git a/tests/aws/services/events/test_events.snapshot.json b/tests/aws/services/events/test_events.snapshot.json
index 3df20f8468b1c..4f9eb8a80d190 100644
--- a/tests/aws/services/events/test_events.snapshot.json
+++ b/tests/aws/services/events/test_events.snapshot.json
@@ -1754,7 +1754,21 @@
       ]
     }
   },
-  "tests/aws/services/events/test_events.py::TestEvents::test_create_connection_validations": {
+  "tests/aws/services/events/test_events.py::TestEvents::test_put_event_with_too_big_detail": {
+    "recorded-date": "18-10-2024, 07:36:18",
+    "recorded-content": {
+      "put-events-too-big-detail-error": {
+        "Error": {
+          "Code": "ValidationException",
+          "Message": "Total size of the entries in the request is over the limit."},
+          "ResponseMetadata": {
+            "HTTPHeaders": {},
+            "HTTPStatusCode": 400
+          }
+        }
+      }
+    },
+    "tests/aws/services/events/test_events.py::TestEvents::test_create_connection_validations": {
     "recorded-date": "14-11-2024, 20:29:49",
     "recorded-content": {
       "create_connection_exc": {
diff --git a/tests/aws/services/events/test_events.validation.json b/tests/aws/services/events/test_events.validation.json
index 7adc430877f4e..eb1027a459232 100644
--- a/tests/aws/services/events/test_events.validation.json
+++ b/tests/aws/services/events/test_events.validation.json
@@ -164,6 +164,9 @@
   "tests/aws/services/events/test_events.py::TestEvents::test_create_connection_validations": {
     "last_validated_date": "2024-11-14T20:29:49+00:00"
   },
+  "tests/aws/services/events/test_events.py::TestEvents::test_put_event_with_too_big_detail": {
+    "last_validated_date": "2024-10-18T07:36:18+00:00"
+  },
   "tests/aws/services/events/test_events.py::TestEvents::test_put_event_without_detail": {
     "last_validated_date": "2024-06-19T10:40:51+00:00"
   },