diff --git a/data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommandOptions.java b/data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommandOptions.java
index aa8ecd5a88..d2e4b96e3d 100755
--- a/data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommandOptions.java
+++ b/data-loader/cli/src/main/java/com/scalar/db/dataloader/cli/command/dataimport/ImportCommandOptions.java
@@ -145,7 +145,8 @@ public class ImportCommandOptions {
   @CommandLine.Option(
       names = {"--data-chunk-size", "-dcs"},
       paramLabel = "<DATA_CHUNK_SIZE>",
-      description = "Maximum number of records to be included in a single data chunk",
+      description =
+          "Maximum number of records to be included in a single data chunk (default: 500)",
       defaultValue = "500")
   protected int dataChunkSize;
 
@@ -153,21 +154,22 @@ public class ImportCommandOptions {
       names = {"--transaction-size", "-ts"},
       paramLabel = "<TRANSACTION_SIZE>",
       description =
-          "Maximum number of put operations that are grouped together into one ScalarDB distributed transaction, only supported in ScalarDB transaction mode",
+          "Maximum number of put operations that are grouped together into one ScalarDB distributed transaction, only supported in ScalarDB transaction mode (default: 100)",
       defaultValue = "100")
   protected int transactionSize;
 
   @CommandLine.Option(
       names = {"--split-log-mode", "-slm"},
       paramLabel = "<SPLIT_LOG_MODE>",
-      description = "Split log file into multiple files based on data chunks",
+      description = "Split log file into multiple files based on data chunks (default: false)",
       defaultValue = "false")
   protected boolean splitLogMode;
 
   @CommandLine.Option(
       names = {"--data-chunk-queue-size", "-qs"},
       paramLabel = "<DATA_CHUNK_QUEUE_SIZE>",
-      description = "Maximum number of data chunks that can be kept at a time for processing",
+      description =
+          "Maximum number of data chunks that can be kept at a time for processing (default: 256)",
       defaultValue = "256")
   protected int dataChunkQueueSize;