diff --git a/libs/util/include/psemek/util/enum.hpp b/libs/util/include/psemek/util/enum.hpp
index c2e20bad..9f9b8056 100644
--- a/libs/util/include/psemek/util/enum.hpp
+++ b/libs/util/include/psemek/util/enum.hpp
@@ -64,6 +64,8 @@ namespace psemek::util
 
 		auto begin() const { return first; }
 		auto end() const { return last; }
+
+		auto size() const { return last.value - first.value; }
 	};
 
 }