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diff --git a/staging_vespalib/src/vespa/vespalib/metrics/dimension.h b/staging_vespalib/src/vespa/vespalib/metrics/dimension.h
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index 00000000000..ee16bc6f98a
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+++ b/staging_vespalib/src/vespa/vespalib/metrics/dimension.h
@@ -0,0 +1,18 @@
+// Copyright 2017 Yahoo Holdings. Licensed under the terms of the Apache 2.0 license. See LICENSE in the project root.
+#pragma once
+
+#include <vespa/vespalib/stllike/string.h>
+#include "handle.h"
+
+namespace vespalib::metrics {
+
+using DimensionName = vespalib::string;
+
+struct DimensionTag {};
+
+/**
+ * Opaque handle representing an uniquely named dimension.
+ **/
+using Dimension = Handle<DimensionTag>;
+
+} // namespace vespalib::metrics