diff --git a/embodichain/lab/gym/utils/gym_utils.py b/embodichain/lab/gym/utils/gym_utils.py
index 20ac316a..b4a2054b 100644
--- a/embodichain/lab/gym/utils/gym_utils.py
+++ b/embodichain/lab/gym/utils/gym_utils.py
@@ -769,6 +769,12 @@ def add_env_launcher_args_to_parser(parser: argparse.ArgumentParser) -> None:
         default=False,
         action="store_true",
     )
+    parser.add_argument(
+        "--arena_space",
+        help="The size of the arena space.",
+        default=5.0,
+        type=float,
+    )
     parser.add_argument(
         "--enable_rt",
         help="Whether to use RTX rendering backend for the simulation.",
@@ -829,6 +835,7 @@ def merge_args_with_gym_config(args: argparse.Namespace, gym_config: dict) -> di
     merged_config["headless"] = args.headless
     merged_config["enable_rt"] = args.enable_rt
     merged_config["gpu_id"] = args.gpu_id
+    merged_config["arena_space"] = args.arena_space
     return merged_config
 
 
@@ -871,6 +878,7 @@ def build_env_cfg_from_args(
         sim_device=gym_config["device"],
         enable_rt=gym_config["enable_rt"],
         gpu_id=gym_config["gpu_id"],
+        arena_space=gym_config["arena_space"],
     )
 
     return cfg, gym_config, action_config