diff --git a/examples/dgf/sb2d.dgf b/examples/dgf/sb2d.dgf
index 703898e5681387b41a00aac46a59fab78958b255..67bd773ed0b37700aa512f6a23542cce615ee419 100644
--- a/examples/dgf/sb2d.dgf
+++ b/examples/dgf/sb2d.dgf
@@ -3,7 +3,7 @@ DGF
 Interval
 0  0                                    % first corner
 1  1                                    % second corner
-4  4                                    % 4 cells in each direction
+8  8                                    % 4 cells in each direction
 #
 
 BoundaryDomain
diff --git a/examples/dgf/sb2d_6400.dgf b/examples/dgf/sb2d_6400.dgf
new file mode 100644
index 0000000000000000000000000000000000000000..e5de50b383681ae81837dde0221b1b6f7b5fb953
--- /dev/null
+++ b/examples/dgf/sb2d_6400.dgf
@@ -0,0 +1,22 @@
+DGF
+
+Interval
+0  0                                    % first corner
+1  1                                    % second corner
+80 80                                    % 4 cells in each direction
+#
+
+BoundaryDomain
+default 1                               % all boundaries have id 1
+#
+
+GridParameter
+name 2d-unit-cube                       % name of the grid
+refinementedge arbitrary                % refinement edge for bisectioning
+overlap 1                               % number of overlap cells
+periodic                                % periodicity parameter for YaspGrid
+closure none                            % no green closure on UGGrid
+copies all                              % let UGGrid make copies
+#
+
+# unitcube2.dgf
diff --git a/examples/dgf/sb2d_65536.dgf b/examples/dgf/sb2d_65536.dgf
new file mode 100644
index 0000000000000000000000000000000000000000..d074a779f30ae12221473be2569260c0fa2b29a8
--- /dev/null
+++ b/examples/dgf/sb2d_65536.dgf
@@ -0,0 +1,22 @@
+DGF
+
+Interval
+0   0                                    % first corner
+1   1                                    % second corner
+256 256                                    % 4 cells in each direction
+#
+
+BoundaryDomain
+default 1                               % all boundaries have id 1
+#
+
+GridParameter
+name 2d-unit-cube                       % name of the grid
+refinementedge arbitrary                % refinement edge for bisectioning
+overlap 1                               % number of overlap cells
+periodic                                % periodicity parameter for YaspGrid
+closure none                            % no green closure on UGGrid
+copies all                              % let UGGrid make copies
+#
+
+# unitcube2.dgf