diff --git a/rigify/generate.py b/rigify/generate.py
index e0da3b00546d33c0bd181c34149cde2b8caae313..0d02c5c24790c20625a34512264c36d45bb683dd 100644
--- a/rigify/generate.py
+++ b/rigify/generate.py
@@ -261,6 +261,8 @@ class Generator(base_generate.BaseGenerator):
             elif name.startswith(DEF_PREFIX):
                 bone.layers = DEF_LAYER
 
+            bone.bbone_x = bone.bbone_z = bone.length * 0.05
+
 
     def __restore_driver_vars(self):
         obj = self.obj