diff --git a/src/pytezos/rpc/protocol.py b/src/pytezos/rpc/protocol.py
index bc1ce252..86117a47 100644
--- a/src/pytezos/rpc/protocol.py
+++ b/src/pytezos/rpc/protocol.py
@@ -50,6 +50,9 @@ def __call__(self, length=1, head=None, min_date=None):
     def _get_block(self, block_id) -> 'BlockQuery':
         return super().__getitem__(block_id)
 
+    def __len__(self):
+        return self._get_block('head').level()
+
     def __getitem__(self, block_id):
         """Construct block query or get a block range.