diff --git a/trezorlib/client.py b/trezorlib/client.py
old mode 100755
new mode 100644
index f176a67c0..3cd2c5790
--- a/trezorlib/client.py
+++ b/trezorlib/client.py
@@ -135,7 +135,8 @@ class TrezorClient(object):
         return ret
 
     def _pprint(self, msg):
-        return "<%s>:\n%s" % (msg.__class__.__name__, msg)
+        ser = msg.SerializeToString()
+        return "<%s> (%d bytes):\n%s" % (msg.__class__.__name__, len(ser), msg)
 
     def setup_debuglink(self, button=None, pin_correct=False):
         self.debug_button = button