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diff --git a/boost/proto/functional/range/size.hpp b/boost/proto/functional/range/size.hpp
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+++ b/boost/proto/functional/range/size.hpp
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+///////////////////////////////////////////////////////////////////////////////
+/// \file size.hpp
+/// Proto callables for boost::size()
+//
+//  Copyright 2012 Eric Niebler. Distributed under the Boost
+//  Software License, Version 1.0. (See accompanying file
+//  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
+
+#ifndef BOOST_PROTO_FUNCTIONAL_RANGE_SIZE_HPP_EAN_27_08_2012
+#define BOOST_PROTO_FUNCTIONAL_RANGE_SIZE_HPP_EAN_27_08_2012
+
+#include <boost/range/size.hpp>
+#include <boost/proto/proto_fwd.hpp>
+
+namespace boost { namespace proto { namespace functional
+{
+
+    // A PolymorphicFunctionObject that wraps boost::size()
+    struct size
+    {
+        BOOST_PROTO_CALLABLE()
+
+        template<typename Sig>
+        struct result;
+
+        template<typename This, typename Rng>
+        struct result<This(Rng)>
+          : boost::range_size<Rng>
+        {};
+
+        template<typename This, typename Rng>
+        struct result<This(Rng &)>
+          : boost::range_size<Rng>
+        {};
+
+        template<typename Rng>
+        typename boost::range_size<Rng>::type operator()(Rng const &rng) const
+        {
+            return boost::size(rng);
+        }
+    };
+
+}}}
+
+#endif