diff --git a/ruby/red-parquet/lib/parquet/arrow-table-savable.rb b/ruby/red-parquet/lib/parquet/arrow-table-savable.rb
index 0163b15ed82..70c5975273f 100644
--- a/ruby/red-parquet/lib/parquet/arrow-table-savable.rb
+++ b/ruby/red-parquet/lib/parquet/arrow-table-savable.rb
@@ -33,7 +33,7 @@ def save_as_parquet
           properties.__send__(set_method_name, value)
         end
       end
-      chunk_size = @options[:chunk_size] || 1024 # TODO
+      chunk_size = @options[:chunk_size] || @table.n_rows
       open_raw_output_stream do |output|
         ArrowFileWriter.open(@table.schema,
                              output,