diff --git a/test/sizeof.cpp b/test/sizeof.cpp
new file mode 100644
index 0000000..d9ad356
--- /dev/null
+++ b/test/sizeof.cpp
@@ -0,0 +1,34 @@
+// This file is part of Eigen, a lightweight C++ template library
+// for linear algebra.
+//
+// Copyright (C) 2008 Gael Guennebaud <gael.guennebaud@inria.fr>
+//
+// This Source Code Form is subject to the terms of the Mozilla
+// Public License v. 2.0. If a copy of the MPL was not distributed
+// with this file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+#include "main.h"
+
+template<typename MatrixType> void verifySizeOf(const MatrixType&)
+{
+  typedef typename MatrixType::Scalar Scalar;
+  if (MatrixType::RowsAtCompileTime!=Dynamic && MatrixType::ColsAtCompileTime!=Dynamic)
+    VERIFY(std::ptrdiff_t(sizeof(MatrixType))==std::ptrdiff_t(sizeof(Scalar))*std::ptrdiff_t(MatrixType::SizeAtCompileTime));
+  else
+    VERIFY(sizeof(MatrixType)==sizeof(Scalar*) + 2 * sizeof(typename MatrixType::Index));
+}
+
+void test_sizeof()
+{
+  CALL_SUBTEST(verifySizeOf(Matrix<float, 1, 1>()) );
+  CALL_SUBTEST(verifySizeOf(Matrix4d()) );
+  CALL_SUBTEST(verifySizeOf(Matrix<double, 4, 2>()) );
+  CALL_SUBTEST(verifySizeOf(Matrix<bool, 7, 5>()) );
+  CALL_SUBTEST(verifySizeOf(MatrixXcf(3, 3)) );
+  CALL_SUBTEST(verifySizeOf(MatrixXi(8, 12)) );
+  CALL_SUBTEST(verifySizeOf(MatrixXcd(20, 20)) );
+  CALL_SUBTEST(verifySizeOf(Matrix<float, 100, 100>()) );
+  
+  VERIFY(sizeof(std::complex<float>) == 2*sizeof(float));
+  VERIFY(sizeof(std::complex<double>) == 2*sizeof(double));
+}