diff --git a/tests/test_users.py b/tests/test_users.py
index 1e85384..74a1eca 100644
--- a/tests/test_users.py
+++ b/tests/test_users.py
@@ -62,6 +62,9 @@ def test_user_list():
     instancetypes = (Movie, TVShow, TVSeason, TVEpisode, Person)
     assert all([isinstance(k, instancetypes) for k in l])
 
+    # len() agrees with what iteration yields
+    assert len(l) == len(list(l))
+
     # PUT to add and remove items from list
     l.add_items()
     for k, v in data.items():
diff --git a/trakt/users.py b/trakt/users.py
index 1a4c6ed..5c728f6 100644
--- a/trakt/users.py
+++ b/trakt/users.py
@@ -214,6 +214,10 @@ def __iter__(self):
         """Iterate over the items in this user list"""
         return self._items.__iter__()
 
+    def __len__(self):
+        """Return the number of items in this user list"""
+        return len(self._items)
+
     @classmethod
     @post
     def create(cls, name, creator, description=None, privacy='private',