diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/misc/serialized_size_fun/serialized_size_fun.01.query.sqlpp b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/misc/serialized_size_fun/serialized_size_fun.01.query.sqlpp
new file mode 100644
index 0000000..d3c8f1a
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/queries_sqlpp/misc/serialized_size_fun/serialized_size_fun.01.query.sqlpp
@@ -0,0 +1,29 @@
+/*
+ * 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.
+ */
+SET `import-private-functions` `true`;
+
+from [
+{"id": 1, "f": 1},
+{"id": 2, "f": true},
+{"id": 3, "f": "test"},
+{"id": 4, "f": [1,2]},
+{"id": 5, "f": {"f1": 1, "f2": [{"n": "str"}]}}
+] AS t
+select t.f AS val, serialized_size(t.f) AS serialized_size
+order by t.id;
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/results/misc/serialized_size_fun/serialized_size_fun.01.adm b/asterixdb/asterix-app/src/test/resources/runtimets/results/misc/serialized_size_fun/serialized_size_fun.01.adm
new file mode 100644
index 0000000..511674b
--- /dev/null
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/results/misc/serialized_size_fun/serialized_size_fun.01.adm
@@ -0,0 +1,5 @@
+{ "serialized_size": 9, "val": 1 }
+{ "serialized_size": 2, "val": true }
+{ "serialized_size": 6, "val": "test" }
+{ "serialized_size": 36, "val": [ 1, 2 ] }
+{ "serialized_size": 88, "val": { "f1": 1, "f2": [ { "n": "str" } ] } }
\ No newline at end of file
diff --git a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
index b77dac5..755d65d 100644
--- a/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
+++ b/asterixdb/asterix-app/src/test/resources/runtimets/testsuite_sqlpp.xml
@@ -7268,6 +7268,11 @@
         <output-dir compare="Text">query-ASTERIXDB-865</output-dir>
       </compilation-unit>
     </test-case>
+    <test-case FilePath="misc">
+      <compilation-unit name="serialized_size_fun">
+        <output-dir compare="Text">serialized_size_fun</output-dir>
+      </compilation-unit>
+    </test-case>
   </test-group>
   <test-group name="multipart-dataverse">
     <test-case FilePath="multipart-dataverse">
diff --git a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
index 56971eb..4db68c3 100644
--- a/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
+++ b/asterixdb/asterix-om/src/main/java/org/apache/asterix/om/functions/BuiltinFunctions.java
@@ -1699,6 +1699,9 @@
     public static final FunctionIdentifier DECODE_DATAVERSE_NAME =
             new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "decode-dataverse-name", 1);
 
+    public static final FunctionIdentifier SERIALIZED_SIZE =
+            new FunctionIdentifier(FunctionConstants.ASTERIX_NS, "serialized-size", 1);
+
     static {
         // first, take care of Algebricks builtin functions
         addFunction(IS_MISSING, BooleanOnlyTypeComputer.INSTANCE, true);
@@ -2530,6 +2533,7 @@
         addFunction(DECODE_DATAVERSE_NAME, OrderedListOfAStringTypeComputer.INSTANCE_NULLABLE, true);
 
         addPrivateFunction(COLLECTION_TO_SEQUENCE, CollectionToSequenceTypeComputer.INSTANCE, true);
+        addPrivateFunction(SERIALIZED_SIZE, AInt64TypeComputer.INSTANCE, true);
 
         // external lookup
         addPrivateFunction(EXTERNAL_LOOKUP, AnyTypeComputer.INSTANCE, false);
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SerializedSizeDescriptor.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SerializedSizeDescriptor.java
new file mode 100644
index 0000000..2669fd7
--- /dev/null
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/evaluators/functions/SerializedSizeDescriptor.java
@@ -0,0 +1,87 @@
+/*
+ * 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.asterix.runtime.evaluators.functions;
+
+import java.io.DataOutput;
+import java.io.IOException;
+
+import org.apache.asterix.formats.nontagged.SerializerDeserializerProvider;
+import org.apache.asterix.om.base.AInt64;
+import org.apache.asterix.om.base.AMutableInt64;
+import org.apache.asterix.om.functions.BuiltinFunctions;
+import org.apache.asterix.om.functions.IFunctionDescriptorFactory;
+import org.apache.asterix.om.types.BuiltinType;
+import org.apache.asterix.runtime.evaluators.base.AbstractScalarFunctionDynamicDescriptor;
+import org.apache.hyracks.algebricks.core.algebra.functions.FunctionIdentifier;
+import org.apache.hyracks.algebricks.runtime.base.IEvaluatorContext;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluator;
+import org.apache.hyracks.algebricks.runtime.base.IScalarEvaluatorFactory;
+import org.apache.hyracks.api.dataflow.value.ISerializerDeserializer;
+import org.apache.hyracks.api.exceptions.HyracksDataException;
+import org.apache.hyracks.data.std.api.IPointable;
+import org.apache.hyracks.data.std.primitive.VoidPointable;
+import org.apache.hyracks.data.std.util.ArrayBackedValueStorage;
+import org.apache.hyracks.dataflow.common.data.accessors.IFrameTupleReference;
+
+public final class SerializedSizeDescriptor extends AbstractScalarFunctionDynamicDescriptor {
+    private static final long serialVersionUID = 1L;
+
+    public static final IFunctionDescriptorFactory FACTORY = SerializedSizeDescriptor::new;
+
+    @Override
+    public IScalarEvaluatorFactory createEvaluatorFactory(IScalarEvaluatorFactory[] args) {
+        return new IScalarEvaluatorFactory() {
+            private static final long serialVersionUID = 1L;
+
+            @Override
+            public IScalarEvaluator createScalarEvaluator(IEvaluatorContext ctx) throws HyracksDataException {
+                return new AbstractScalarEval(sourceLoc, getIdentifier()) {
+                    private final IScalarEvaluator eval0 = args[0].createScalarEvaluator(ctx);
+                    private final VoidPointable arg0 = VoidPointable.FACTORY.createPointable();
+                    private final ArrayBackedValueStorage resultStorage = new ArrayBackedValueStorage();
+                    private final DataOutput resultOut = resultStorage.getDataOutput();
+
+                    @SuppressWarnings("unchecked")
+                    private final ISerializerDeserializer<AInt64> int64Serde =
+                            SerializerDeserializerProvider.INSTANCE.getSerializerDeserializer(BuiltinType.AINT64);
+                    private final AMutableInt64 int64 = new AMutableInt64(0);
+
+                    @Override
+                    public void evaluate(IFrameTupleReference tuple, IPointable result) throws HyracksDataException {
+                        resultStorage.reset();
+                        eval0.evaluate(tuple, arg0);
+                        int64.setValue(arg0.getLength());
+                        try {
+                            int64Serde.serialize(int64, resultOut);
+                            result.set(resultStorage);
+                        } catch (IOException e) {
+                            throw HyracksDataException.create(e);
+                        }
+                    }
+                };
+            }
+        };
+    }
+
+    @Override
+    public FunctionIdentifier getIdentifier() {
+        return BuiltinFunctions.SERIALIZED_SIZE;
+    }
+}
diff --git a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
index 35993cf..867a8d0 100644
--- a/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
+++ b/asterixdb/asterix-runtime/src/main/java/org/apache/asterix/runtime/functions/FunctionCollection.java
@@ -446,6 +446,7 @@
 import org.apache.asterix.runtime.evaluators.functions.RandomDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.RandomWithSeedDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.ReferenceTileDescriptor;
+import org.apache.asterix.runtime.evaluators.functions.SerializedSizeDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.SleepDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.SpatialAreaDescriptor;
 import org.apache.asterix.runtime.evaluators.functions.SpatialCellDescriptor;
@@ -1315,6 +1316,7 @@
         // Other functions
         fc.add(DecodeDataverseNameDescriptor.FACTORY);
         fc.add(RandomWithSeedDescriptor.FACTORY);
+        fc.add(SerializedSizeDescriptor.FACTORY);
 
         ServiceLoader.load(IFunctionRegistrant.class).iterator().forEachRemaining(c -> c.register(fc));
         return fc;