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diff --git a/compiler/loco/include/loco/IR/DataTypeTraits.h b/compiler/loco/include/loco/IR/DataTypeTraits.h
new file mode 100644
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+++ b/compiler/loco/include/loco/IR/DataTypeTraits.h
@@ -0,0 +1,86 @@
+/*
+ * Copyright (c) 2019 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * 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.
+ */
+
+#ifndef __LOCO_IR_DATA_TYPE_TRAITS_H__
+#define __LOCO_IR_DATA_TYPE_TRAITS_H__
+
+#include "loco/IR/DataType.h"
+
+#include <cassert>
+#include <cstdint>
+
+namespace loco
+{
+
+/**
+ * @brief C++ scalar type corresponding to each DataType
+ */
+template <DataType DT> struct DataTypeImpl
+{
+  // using Type = ...
+};
+
+// TODO Support other enum values
+template <> struct DataTypeImpl<DataType::S8>
+{
+  // Use C++ int8_t type for 8bit integer
+  using Type = int8_t;
+};
+
+template <> struct DataTypeImpl<DataType::U8>
+{
+  // Use C++ uint8_t type for unsigned 8bit integer
+  using Type = uint8_t;
+};
+
+template <> struct DataTypeImpl<DataType::S32>
+{
+  // Use C++ int32_t type for 32bit integer
+  using Type = int32_t;
+};
+
+template <> struct DataTypeImpl<DataType::FLOAT32>
+{
+  // Use C++ float type for IEEE 32-bit floating-point numbers
+  using Type = float;
+};
+
+/**
+ * @brief Returns the size of the data type.
+ * @note If you need the size at compile time, use `sizeof(typename DataTypeImpl<DT>::Type)`.
+ */
+inline uint32_t size(DataType data_type)
+{
+  switch (data_type)
+  {
+    case DataType::S8:
+      return sizeof(DataTypeImpl<DataType::S8>::Type);
+    case DataType::U8:
+      return sizeof(DataTypeImpl<DataType::U8>::Type);
+    case DataType::S32:
+      return sizeof(DataTypeImpl<DataType::S32>::Type);
+    case DataType::FLOAT32:
+      return sizeof(DataTypeImpl<DataType::FLOAT32>::Type);
+    default:
+      // TODO Support remaining data types.
+      assert(false);
+      return UINT32_MAX; // Avoid compiler warning.
+  }
+}
+
+} // namespace loco
+
+#endif // __LOCO_IR_DATA_TYPE_TRAITS_H__