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diff --git a/src/cpp/ext/filters/census/measures.cc b/src/cpp/ext/filters/census/measures.cc
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+++ b/src/cpp/ext/filters/census/measures.cc
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+/*
+ *
+ * Copyright 2018 gRPC authors.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+#include <grpc/support/port_platform.h>
+
+#include "src/cpp/ext/filters/census/measures.h"
+
+#include "opencensus/stats/stats.h"
+#include "src/cpp/ext/filters/census/grpc_plugin.h"
+
+namespace grpc {
+
+using ::opencensus::stats::MeasureDouble;
+using ::opencensus::stats::MeasureInt64;
+
+// These measure definitions should be kept in sync across opencensus
+// implementations--see
+// https://github.com/census-instrumentation/opencensus-java/blob/master/contrib/grpc_metrics/src/main/java/io/opencensus/contrib/grpc/metrics/RpcMeasureConstants.java.
+
+namespace {
+
+// Unit constants
+constexpr char kUnitBytes[] = "By";
+constexpr char kUnitMilliseconds[] = "ms";
+constexpr char kCount[] = "1";
+
+}  // namespace
+
+// Client
+MeasureDouble RpcClientSentBytesPerRpc() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcClientSentBytesPerRpcMeasureName,
+      "Total bytes sent across all request messages per RPC", kUnitBytes);
+  return measure;
+}
+
+MeasureDouble RpcClientReceivedBytesPerRpc() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcClientReceivedBytesPerRpcMeasureName,
+      "Total bytes received across all response messages per RPC", kUnitBytes);
+  return measure;
+}
+
+MeasureDouble RpcClientRoundtripLatency() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcClientRoundtripLatencyMeasureName,
+      "Time between first byte of request sent to last byte of response "
+      "received, or terminal error",
+      kUnitMilliseconds);
+  return measure;
+}
+
+MeasureDouble RpcClientServerLatency() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcClientServerLatencyMeasureName,
+      "Time between first byte of request received to last byte of response "
+      "sent, or terminal error (propagated from the server)",
+      kUnitMilliseconds);
+  return measure;
+}
+
+MeasureInt64 RpcClientSentMessagesPerRpc() {
+  static const auto measure =
+      MeasureInt64::Register(kRpcClientSentMessagesPerRpcMeasureName,
+                             "Number of messages sent per RPC", kCount);
+  return measure;
+}
+
+MeasureInt64 RpcClientReceivedMessagesPerRpc() {
+  static const auto measure =
+      MeasureInt64::Register(kRpcClientReceivedMessagesPerRpcMeasureName,
+                             "Number of messages received per RPC", kCount);
+  return measure;
+}
+
+// Server
+MeasureDouble RpcServerSentBytesPerRpc() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcServerSentBytesPerRpcMeasureName,
+      "Total bytes sent across all messages per RPC", kUnitBytes);
+  return measure;
+}
+
+MeasureDouble RpcServerReceivedBytesPerRpc() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcServerReceivedBytesPerRpcMeasureName,
+      "Total bytes received across all messages per RPC", kUnitBytes);
+  return measure;
+}
+
+MeasureDouble RpcServerServerLatency() {
+  static const auto measure = MeasureDouble::Register(
+      kRpcServerServerLatencyMeasureName,
+      "Time between first byte of request received to last byte of response "
+      "sent, or terminal error",
+      kUnitMilliseconds);
+  return measure;
+}
+
+MeasureInt64 RpcServerSentMessagesPerRpc() {
+  static const auto measure =
+      MeasureInt64::Register(kRpcServerSentMessagesPerRpcMeasureName,
+                             "Number of messages sent per RPC", kCount);
+  return measure;
+}
+
+MeasureInt64 RpcServerReceivedMessagesPerRpc() {
+  static const auto measure =
+      MeasureInt64::Register(kRpcServerReceivedMessagesPerRpcMeasureName,
+                             "Number of messages received per RPC", kCount);
+  return measure;
+}
+
+}  // namespace grpc