diff --git a/libs/parser_post.py b/libs/parser_post.py
index af64711..e9ea625 100644
--- a/libs/parser_post.py
+++ b/libs/parser_post.py
@@ -106,7 +106,8 @@ def convert_to_pickle_rss(
     visualize: bool = False, 
     output_map: bool = False,
     filters: int = None,
-    sampling: bool = False
+    sampling: bool = False,
+    map_dim: tuple = None
 ):
     '''
     modified from Zhuolin
@@ -118,6 +119,10 @@ def convert_to_pickle_rss(
     # load data and split into different types
     results = load_rss_data_with_pkt_types(fp, orientation)
 
+    # define map dimension
+    if map_dim is None:
+        map_dim = (PICKLE_MAP_SIZE, PICKLE_MAP_SIZE)
+
     # pick the most frequent type
     pkt_types = [(key, len(results[key])) for key in results.keys()]
     pkt_types = sorted(pkt_types, key=lambda x: x[1], reverse=True)
@@ -135,14 +140,14 @@ def convert_to_pickle_rss(
     
     # convert it to a map
     # rss_map_dict = {}
-    rss_map = np.ones((PICKLE_MAP_SIZE, PICKLE_MAP_SIZE)) * -85.0
+    rss_map = np.ones(map_dim) * -85.0
     factor = 0.75
 
-    for i in range(PICKLE_MAP_SIZE):
+    for i in range(map_dim[0]):
         # if i not in rss_map_dict:
         #     rss_map_dict[i] = {}
         # search for x_idx
-        upper_bound_x = loc_x_center + PICKLE_MAP_STEP * (i - (PICKLE_MAP_SIZE / 2) + 0.5)
+        upper_bound_x = loc_x_center + PICKLE_MAP_STEP * (i - (map_dim[0] / 2) + 0.5)
         lower_bound_x = upper_bound_x - PICKLE_MAP_STEP
         data_x_idxs = find_index(
             data[0, :],
@@ -153,9 +158,9 @@ def convert_to_pickle_rss(
         if data_part.size is 0:
             continue
         data_y_idx = 0
-        for j in range(PICKLE_MAP_SIZE):
+        for j in range(map_dim[1]):
             # search for y_idx
-            upper_bound_y = loc_y_center + PICKLE_MAP_STEP * (j - (PICKLE_MAP_SIZE / 2) + 0.5)
+            upper_bound_y = loc_y_center + PICKLE_MAP_STEP * (j - (map_dim[1] / 2) + 0.5)
             lower_bound_y = upper_bound_y - PICKLE_MAP_STEP
             data_y_idxs = find_index(
                 data_part[1, :],
diff --git a/preprocessor.py b/preprocessor.py
index 86b50d3..e6ca89a 100644
--- a/preprocessor.py
+++ b/preprocessor.py
@@ -78,7 +78,8 @@ def convert_to_pickle(
     is_csi=False,
     output_map=False,
     sampling=False, 
-    sampling_num=5
+    sampling_num=5,
+    map_dim=None
 ):
     '''
     '''
@@ -99,7 +100,8 @@ def convert_to_pickle(
                             visualize=visualize,
                             output_map=output_map,
                             filters=fff,
-                            sampling=sampling
+                            sampling=sampling,
+                            map_dim=map_dim
                         )
                 else:
                     convert_to_pickle_rss(
@@ -108,7 +110,8 @@ def convert_to_pickle(
                         visualize=visualize,
                         output_map=output_map,
                         filters=filters,
-                        sampling=sampling
+                        sampling=sampling,
+                        map_dim=map_dim
                     )
             except KeyboardInterrupt:
                 print("KeyboardInterrupt happened")
@@ -217,6 +220,18 @@ if __name__ == '__main__':
         default=0,
         help='Specify orientation of the map'
     )
+    parser.add_argument(
+        '--dimension',
+        dest='dimension',
+        default=None,
+        help='Specify dimension/size of the map via `--dimension="width height"`, default 64x64'
+    )
     args, __ = parser.parse_known_args()
 
+    try:
+        args.dimension = [int(x) for x in args.dimension.split(" ")]
+    except BaseException:
+        print("err parsing dimension..")
+        exit(2)
+
     main(args)