diff --git a/hips/tiles/tests/test_tile.py b/hips/tiles/tests/test_tile.py
index 535b005..a6c2107 100644
--- a/hips/tiles/tests/test_tile.py
+++ b/hips/tiles/tests/test_tile.py
@@ -11,7 +11,7 @@ def setup_class(cls):
         filename = get_pkg_data_filename('data/properties.txt')
         hips_description = HipsDescription.read(filename)
 
-        cls.tile = HipsTile(hips_description, 6, 24185, 'jpg')
+        cls.tile = HipsTile(hips_description, 6, 24185, 'jpg', 512)
         cls.tile.base_url = 'http://alasky.unistra.fr/DSS/DSSColor'
 
     def test_base_url(self):
diff --git a/hips/tiles/tile.py b/hips/tiles/tile.py
index 4f0fd3e..a55aa20 100644
--- a/hips/tiles/tile.py
+++ b/hips/tiles/tile.py
@@ -29,6 +29,8 @@ class HipsTile:
         Order of the HiPS
     ipix : `int`
         HEALPix pixel number
+    tile_width : `int`
+        Width of HiPS tile
     format : `format`
         Format of HiPS tile
     data : `list`
@@ -54,10 +56,11 @@ class HipsTile:
          [4261 3581 3842 ..., 7095 6390 6191]]
     """
 
-    def __init__(self, hips_description: HipsDescription, order: int, ipix: int, format: str, data: list=None) -> None:
+    def __init__(self, hips_description: HipsDescription, order: int, ipix: int, format: str, data: list=None, tile_width: int=512) -> None:
         self.hips_description = hips_description
         self.order = order
         self.ipix = ipix
+        self.tile_width = tile_width
         self.format = format
         self.data = data