diff --git a/examples/images_contours_and_fields/matshow.py b/examples/images_contours_and_fields/matshow.py
index 376ba514dc00..ce940670a7c2 100644
--- a/examples/images_contours_and_fields/matshow.py
+++ b/examples/images_contours_and_fields/matshow.py
@@ -18,6 +18,6 @@ def samplemat(dims):
 
 
 # Display matrix
-plt.matshow(samplemat((15, 35)))
+plt.matshow(samplemat((15, 15)))
 
 plt.show()