diff --git a/common/tier4_perception_rviz_plugin/src/tools/pedestrian_pose.cpp b/common/tier4_perception_rviz_plugin/src/tools/pedestrian_pose.cpp
index a6e0d34c3aa37..dc95371ef5c22 100644
--- a/common/tier4_perception_rviz_plugin/src/tools/pedestrian_pose.cpp
+++ b/common/tier4_perception_rviz_plugin/src/tools/pedestrian_pose.cpp
@@ -113,8 +113,8 @@ Object PedestrianInitialPoseTool::createObjectMsg() const
 
   // shape
   object.shape.type = Shape::CYLINDER;
-  const double width = 0.8;
-  const double length = 0.8;
+  const double width = 0.6;
+  const double length = 0.6;
   object.shape.dimensions.x = length;
   object.shape.dimensions.y = width;
   object.shape.dimensions.z = 2.0;