diff --git a/doc/pattern_tools/gen_pattern.py b/doc/pattern_tools/gen_pattern.py
index 1f90615736262643b4af854e1161b2a74aeae1f9..a6ffc7ca7ed7e2e9f5eb62bd2f6c383b199128bb 100755
--- a/doc/pattern_tools/gen_pattern.py
+++ b/doc/pattern_tools/gen_pattern.py
@@ -92,11 +92,11 @@ def main():
                         dest="square_size", type=float)
     parser.add_argument("-R", "--radius_rate", help="circles_radius = square_size/radius_rate", default="5.0",
                         action="store", dest="radius_rate", type=float)
-    parser.add_argument("-w", "--page_width", help="page width in units", default="216", action="store",
+    parser.add_argument("-w", "--page_width", help="page width in units", default=argparse.SUPPRESS, action="store",
                         dest="page_width", type=float)
-    parser.add_argument("-h", "--page_height", help="page height in units", default="279", action="store",
-                        dest="page_width", type=float)
-    parser.add_argument("-a", "--page_size", help="page size, supersedes -h -w arguments", default="A4", action="store",
+    parser.add_argument("-h", "--page_height", help="page height in units", default=argparse.SUPPRESS, action="store",
+                        dest="page_height", type=float)
+    parser.add_argument("-a", "--page_size", help="page size, superseded if -h and -w are set", default="A4", action="store",
                         dest="page_size", choices=["A0", "A1", "A2", "A3", "A4", "A5"])
     args = parser.parse_args()
 
@@ -111,12 +111,16 @@ def main():
     units = args.units
     square_size = args.square_size
     radius_rate = args.radius_rate
-    page_size = args.page_size
-    # page size dict (ISO standard, mm) for easy lookup. format - size: [width, height]
-    page_sizes = {"A0": [840, 1188], "A1": [594, 840], "A2": [420, 594], "A3": [297, 420], "A4": [210, 297],
-                  "A5": [148, 210]}
-    page_width = page_sizes[page_size.upper()][0]
-    page_height = page_sizes[page_size.upper()][1]
+    if 'page_width' and 'page_height' in args:
+        page_width = args.page_width
+        page_height = args.page_height
+    else:
+        page_size = args.page_size
+        # page size dict (ISO standard, mm) for easy lookup. format - size: [width, height]
+        page_sizes = {"A0": [840, 1188], "A1": [594, 840], "A2": [420, 594], "A3": [297, 420], "A4": [210, 297],
+                      "A5": [148, 210]}
+        page_width = page_sizes[page_size][0]
+        page_height = page_sizes[page_size][1]
     pm = PatternMaker(columns, rows, output, units, square_size, radius_rate, page_width, page_height)
     # dict for easy lookup of pattern type
     mp = {"circles": pm.make_circles_pattern, "acircles": pm.make_acircles_pattern,