diff --git a/python/pyspark/sql/pandas/map_ops.py b/python/pyspark/sql/pandas/map_ops.py
index 2184fdce52d4..1370cad33b1d 100644
--- a/python/pyspark/sql/pandas/map_ops.py
+++ b/python/pyspark/sql/pandas/map_ops.py
@@ -44,7 +44,8 @@ def mapInPandas(
         together as an iterator of `pandas.DataFrame`\\s to the function and the
         returned iterator of `pandas.DataFrame`\\s are combined as a :class:`DataFrame`.
         Each `pandas.DataFrame` size can be controlled by
-        `spark.sql.execution.arrow.maxRecordsPerBatch`.
+        `spark.sql.execution.arrow.maxRecordsPerBatch`. The size of the function's input and
+        output can be different.
 
         .. versionadded:: 3.0.0
 
@@ -108,7 +109,8 @@ def mapInArrow(
         together as an iterator of `pyarrow.RecordBatch`\\s to the function and the
         returned iterator of `pyarrow.RecordBatch`\\s are combined as a :class:`DataFrame`.
         Each `pyarrow.RecordBatch` size can be controlled by
-        `spark.sql.execution.arrow.maxRecordsPerBatch`.
+        `spark.sql.execution.arrow.maxRecordsPerBatch`. The size of the function's input and
+        output can be different.
 
         .. versionadded:: 3.3.0