diff --git a/paimon-api/src/main/java/org/apache/paimon/types/MapType.java b/paimon-api/src/main/java/org/apache/paimon/types/MapType.java
index 75ea5fbb7cc2..4c3344dad60d 100644
--- a/paimon-api/src/main/java/org/apache/paimon/types/MapType.java
+++ b/paimon-api/src/main/java/org/apache/paimon/types/MapType.java
@@ -19,6 +19,7 @@
 package org.apache.paimon.types;
 
 import org.apache.paimon.annotation.Public;
+import org.apache.paimon.utils.MathUtils;
 import org.apache.paimon.utils.Preconditions;
 
 import org.apache.paimon.shade.jackson2.com.fasterxml.jackson.core.JsonGenerator;
@@ -66,7 +67,7 @@ public DataType getValueType() {
 
     @Override
     public int defaultSize() {
-        return keyType.defaultSize() + valueType.defaultSize();
+        return MathUtils.addSafely(keyType.defaultSize(), valueType.defaultSize());
     }
 
     @Override
diff --git a/paimon-api/src/main/java/org/apache/paimon/types/MultisetType.java b/paimon-api/src/main/java/org/apache/paimon/types/MultisetType.java
index e211e1d8b29b..76101a0d498a 100644
--- a/paimon-api/src/main/java/org/apache/paimon/types/MultisetType.java
+++ b/paimon-api/src/main/java/org/apache/paimon/types/MultisetType.java
@@ -19,6 +19,7 @@
 package org.apache.paimon.types;
 
 import org.apache.paimon.annotation.Public;
+import org.apache.paimon.utils.MathUtils;
 import org.apache.paimon.utils.Preconditions;
 
 import org.apache.paimon.shade.jackson2.com.fasterxml.jackson.core.JsonGenerator;
@@ -63,7 +64,7 @@ public DataType getElementType() {
 
     @Override
     public int defaultSize() {
-        return elementType.defaultSize() + 4;
+        return MathUtils.addSafely(elementType.defaultSize(), 4);
     }
 
     @Override
diff --git a/paimon-api/src/main/java/org/apache/paimon/types/RowType.java b/paimon-api/src/main/java/org/apache/paimon/types/RowType.java
index e592ff71619b..30b357f5b944 100644
--- a/paimon-api/src/main/java/org/apache/paimon/types/RowType.java
+++ b/paimon-api/src/main/java/org/apache/paimon/types/RowType.java
@@ -21,6 +21,7 @@
 import org.apache.paimon.annotation.Public;
 import org.apache.paimon.schema.Schema;
 import org.apache.paimon.table.SpecialFields;
+import org.apache.paimon.utils.MathUtils;
 import org.apache.paimon.utils.Preconditions;
 import org.apache.paimon.utils.StringUtils;
 
@@ -158,7 +159,9 @@ public int getFieldIndexByFieldId(int fieldId) {
 
     @Override
     public int defaultSize() {
-        return fields.stream().mapToInt(f -> f.type().defaultSize()).sum();
+        return fields.stream()
+                .mapToInt(f -> f.type().defaultSize())
+                .reduce(0, MathUtils::addSafely);
     }
 
     @Override
diff --git a/paimon-api/src/test/java/org/apache/paimon/types/DefaultSizeOverflowTest.java b/paimon-api/src/test/java/org/apache/paimon/types/DefaultSizeOverflowTest.java
new file mode 100644
index 000000000000..11cb08ce0f4a
--- /dev/null
+++ b/paimon-api/src/test/java/org/apache/paimon/types/DefaultSizeOverflowTest.java
@@ -0,0 +1,73 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.paimon.types;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests that {@link RowType}, {@link MapType} and {@link MultisetType} saturate their {@code
+ * defaultSize()} at {@link Integer#MAX_VALUE} instead of overflowing to a negative value.
+ */
+class DefaultSizeOverflowTest {
+
+    @Test
+    void testRowTypeDefaultSize() {
+        assertThat(DataTypes.ROW(DataTypes.INT(), DataTypes.BIGINT()).defaultSize()).isEqualTo(12);
+    }
+
+    @Test
+    void testRowTypeDefaultSizeOverflowReturnsMaxValue() {
+        assertThat(
+                        DataTypes.ROW(
+                                        DataTypes.VECTOR(Integer.MAX_VALUE, DataTypes.FLOAT()),
+                                        DataTypes.VECTOR(Integer.MAX_VALUE, DataTypes.FLOAT()))
+                                .defaultSize())
+                .isEqualTo(Integer.MAX_VALUE);
+    }
+
+    @Test
+    void testMapTypeDefaultSize() {
+        assertThat(DataTypes.MAP(DataTypes.INT(), DataTypes.BIGINT()).defaultSize()).isEqualTo(12);
+    }
+
+    @Test
+    void testMapTypeDefaultSizeOverflowReturnsMaxValue() {
+        assertThat(
+                        DataTypes.MAP(
+                                        DataTypes.VECTOR(Integer.MAX_VALUE, DataTypes.FLOAT()),
+                                        DataTypes.VECTOR(Integer.MAX_VALUE, DataTypes.FLOAT()))
+                                .defaultSize())
+                .isEqualTo(Integer.MAX_VALUE);
+    }
+
+    @Test
+    void testMultisetTypeDefaultSize() {
+        assertThat(DataTypes.MULTISET(DataTypes.INT()).defaultSize()).isEqualTo(8);
+    }
+
+    @Test
+    void testMultisetTypeDefaultSizeOverflowReturnsMaxValue() {
+        assertThat(
+                        DataTypes.MULTISET(DataTypes.VECTOR(Integer.MAX_VALUE, DataTypes.FLOAT()))
+                                .defaultSize())
+                .isEqualTo(Integer.MAX_VALUE);
+    }
+}