diff --git a/examples/collection/4d_collection.cc b/examples/collection/4d_collection.cc
new file mode 100644
index 0000000000..c3d66ba4e5
--- /dev/null
+++ b/examples/collection/4d_collection.cc
@@ -0,0 +1,75 @@
+/*
+//@HEADER
+// *****************************************************************************
+//
+//                              4d_collection.cc
+//                       DARMA/vt => Virtual Transport
+//
+// Copyright 2019-2024 National Technology & Engineering Solutions of Sandia, LLC
+// (NTESS). Under the terms of Contract DE-NA0003525 with NTESS, the U.S.
+// Government retains certain rights in this software.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are met:
+//
+// * Redistributions of source code must retain the above copyright notice,
+//   this list of conditions and the following disclaimer.
+//
+// * Redistributions in binary form must reproduce the above copyright notice,
+//   this list of conditions and the following disclaimer in the documentation
+//   and/or other materials provided with the distribution.
+//
+// * Neither the name of the copyright holder nor the names of its
+//   contributors may be used to endorse or promote products derived from this
+//   software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+// ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+// POSSIBILITY OF SUCH DAMAGE.
+//
+// Questions? Contact darma@sandia.gov
+//
+// *****************************************************************************
+//@HEADER
+*/
+
+#include <vt/transport.h>
+
+struct Example4D : vt::Collection<Example4D, vt::Index4D> {
+
+  Example4D() = default;
+
+  void hello() {
+    fmt::print(
+      "{}: Hello from Example4D: {}\n", vt::theContext()->getNode(), getIndex()
+    );
+  }
+
+};
+
+int main(int argc, char** argv) {
+  vt::initialize(argc, argv);
+
+  auto range = vt::Index4D(2,4,3,2);
+
+  auto proxy = vt::makeCollection<Example4D>("4d_collection")
+    .bounds(range)
+    .bulkInsert()
+    .wait();
+
+  if (vt::theContext()->getNode() == 0) {
+    proxy.broadcast<&Example4D::hello>();
+  }
+
+
+  vt::finalize();
+  return 0;
+}
diff --git a/examples/collection/CMakeLists.txt b/examples/collection/CMakeLists.txt
index 5e959292e0..7daf1df4d4 100644
--- a/examples/collection/CMakeLists.txt
+++ b/examples/collection/CMakeLists.txt
@@ -10,6 +10,7 @@ set(
   insertable_collection
   reduce_integral
   transpose
+  4d_collection
 )
 
 foreach(EXAMPLE_NAME ${COLLECTION_EXAMPLES})
diff --git a/src/vt/topos/index/dense/dense_array.h b/src/vt/topos/index/dense/dense_array.h
index 88180268b2..21f02d40e6 100644
--- a/src/vt/topos/index/dense/dense_array.h
+++ b/src/vt/topos/index/dense/dense_array.h
@@ -125,7 +125,7 @@ struct DenseIndexArray : BaseIndex, serialization::ByteCopyTrait {
   DenseIndexArrayType operator+(DenseIndexArrayType const& other) const;
   DenseIndexArrayType operator-(DenseIndexArrayType const& other) const;
 
-  // special accessors (x,y,z) enabled depending on the number of dimensions
+  // special accessors (x,y,z,u,v,w) enabled depending on the number of dimensions
   template <
     typename T = void, typename = typename std::enable_if<ndim >= 1, T>::type
   >
@@ -141,6 +141,21 @@ struct DenseIndexArray : BaseIndex, serialization::ByteCopyTrait {
   >
   IndexType z() const;
 
+  template <
+    typename T = void, typename = typename std::enable_if<ndim >= 4, T>::type
+  >
+  IndexType u() const;
+
+  template <
+    typename T = void, typename = typename std::enable_if<ndim >= 5, T>::type
+  >
+  IndexType v() const;
+
+  template <
+    typename T = void, typename = typename std::enable_if<ndim >= 6, T>::type
+  >
+  IndexType w() const;
+
   template <typename IndexT, NumDimensionsType nd>
   friend std::ostream& operator<<(
     std::ostream& os, DenseIndexArray<IndexT,nd> const& idx
diff --git a/src/vt/topos/index/dense/dense_array.impl.h b/src/vt/topos/index/dense/dense_array.impl.h
index 61b6f1cdf6..39593786bc 100644
--- a/src/vt/topos/index/dense/dense_array.impl.h
+++ b/src/vt/topos/index/dense/dense_array.impl.h
@@ -231,7 +231,7 @@ DenseIndexArray<IndexType, ndim>::operator-(DenseIndexArrayType const& other) co
   return val;
 }
 
-// special accessors (x,y,z) enabled depending on the number of dimensions
+// special accessors (x,y,z,u,v,w) enabled depending on the number of dimensions
 template <typename IndexType, NumDimensionsType ndim>
 template <typename T, typename>
 IndexType DenseIndexArray<IndexType, ndim>::x() const {
@@ -250,6 +250,24 @@ IndexType DenseIndexArray<IndexType, ndim>::z() const {
   return dims[2];
 }
 
+template <typename IndexType, NumDimensionsType ndim>
+template <typename T, typename>
+IndexType DenseIndexArray<IndexType, ndim>::u() const {
+  return dims[3];
+}
+
+template <typename IndexType, NumDimensionsType ndim>
+template <typename T, typename>
+IndexType DenseIndexArray<IndexType, ndim>::v() const {
+  return dims[4];
+}
+
+template <typename IndexType, NumDimensionsType ndim>
+template <typename T, typename>
+IndexType DenseIndexArray<IndexType, ndim>::w() const {
+  return dims[5];
+}
+
 template <typename IndexT, NumDimensionsType nd>
 std::ostream& operator<<(
   std::ostream& os, ::vt::index::DenseIndexArray<IndexT,nd> const& idx
diff --git a/src/vt/topos/index/index.h b/src/vt/topos/index/index.h
index aa68e41235..f9ed4707c9 100644
--- a/src/vt/topos/index/index.h
+++ b/src/vt/topos/index/index.h
@@ -59,11 +59,17 @@ using IdxBase = int32_t;
 template <typename T = IdxBase> using Index1D  = DenseIndexArray<T, 1>;
 template <typename T = IdxBase> using Index2D  = DenseIndexArray<T, 2>;
 template <typename T = IdxBase> using Index3D  = DenseIndexArray<T, 3>;
+template <typename T = IdxBase> using Index4D  = DenseIndexArray<T, 4>;
+template <typename T = IdxBase> using Index5D  = DenseIndexArray<T, 5>;
+template <typename T = IdxBase> using Index6D  = DenseIndexArray<T, 6>;
 template <typename T, int8_t N> using IdxType = DenseIndexArray<T, N>;
 
 static_assert(IndexTraits<Index1D<IdxBase>>::is_index, "Does not conform");
 static_assert(IndexTraits<Index2D<IdxBase>>::is_index, "Does not conform");
 static_assert(IndexTraits<Index3D<IdxBase>>::is_index, "Does not conform");
+static_assert(IndexTraits<Index4D<IdxBase>>::is_index, "Does not conform");
+static_assert(IndexTraits<Index5D<IdxBase>>::is_index, "Does not conform");
+static_assert(IndexTraits<Index6D<IdxBase>>::is_index, "Does not conform");
 
 }}  // end namespace vt::index
 
@@ -76,6 +82,9 @@ using IdxBase    = index::IdxBase;
 using Index1D  = index::Index1D<index::IdxBase>;
 using Index2D  = index::Index2D<index::IdxBase>;
 using Index3D  = index::Index3D<index::IdxBase>;
+using Index4D  = index::Index4D<index::IdxBase>;
+using Index5D  = index::Index5D<index::IdxBase>;
+using Index6D  = index::Index6D<index::IdxBase>;
 template <int8_t N>
 using IndexND  = index::IdxType<index::IdxBase, N>;
 
@@ -83,6 +92,9 @@ template <typename T, int8_t N> using IdxType   = index::IdxType<T, N>;
 template <typename T>           using IdxType1D = index::Index1D<T>;
 template <typename T>           using IdxType2D = index::Index2D<T>;
 template <typename T>           using IdxType3D = index::Index3D<T>;
+template <typename T>           using IdxType4D = index::Index4D<T>;
+template <typename T>           using IdxType5D = index::Index5D<T>;
+template <typename T>           using IdxType6D = index::Index6D<T>;
 
 }  // end namespace vt