diff --git a/eventlet/pool.py b/eventlet/pool.py
index 0436d8b..d010ff4 100644
--- a/eventlet/pool.py
+++ b/eventlet/pool.py
@@ -15,6 +15,10 @@ class Pool(object):
         else:
             self.results = None
 
+    @property
+    def current_size(self):
+        return len(self.procs)
+
     def free(self):
         return self.sem.counter