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diff --git a/arm_compute/core/Size3D.h b/arm_compute/core/Size3D.h
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+/*
+ * Copyright (c) 2021 Arm Limited.
+ *
+ * SPDX-License-Identifier: MIT
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a copy
+ * of this software and associated documentation files (the "Software"), to
+ * deal in the Software without restriction, including without limitation the
+ * rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in all
+ * copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+ * SOFTWARE.
+ */
+#ifndef ARM_COMPUTE_SIZE3D_H
+#define ARM_COMPUTE_SIZE3D_H
+
+#include <string>
+
+namespace arm_compute
+{
+/** Class for specifying the size of a 3D shape or object */
+class Size3D
+{
+public:
+    /** Default constructor */
+    Size3D() = default;
+    /** Constructor. Initializes "width", "height" and "depth" respectively with "w", "h" and "d"
+     *
+     * @param[in] w Width of the 3D shape or object
+     * @param[in] h Height of the 3D shape or object
+     * @param[in] d Depth of the 3D shape or object
+     */
+    Size3D(size_t w, size_t h, size_t d) noexcept : width(w), height(h), depth(d)
+    {
+    }
+
+    /** Convert the values stored to string
+     *
+     * @return string of (width x height x depth).
+     */
+    std::string to_string() const;
+
+    /** Semantic accessor for width as x.
+     *
+     * @return x.
+     */
+    size_t x() const
+    {
+        return width;
+    }
+
+    /** Semantic accessor for height as y.
+     *
+     * @return y.
+     */
+    size_t y() const
+    {
+        return height;
+    }
+
+    /** Semantic accessor for depth as z.
+     *
+     * @return z.
+     */
+    size_t z() const
+    {
+        return depth;
+    }
+
+    bool operator!=(const Size3D &other) const
+    {
+        return !(*this == other);
+    }
+
+    bool operator==(const Size3D &other) const
+    {
+        return (width == other.width) && (height == other.height) && (depth == other.depth);
+    }
+
+public:
+    size_t width  = {}; /**< Width of the 3D shape or object */
+    size_t height = {}; /**< Height of the 3D shape or object */
+    size_t depth  = {}; /**< Depth of the 3D shape or object */
+};
+
+} // namespace arm_compute
+#endif /* ARM_COMPUTE_SIZE3D_H */