Per w:Village_pump_(technical)#How_do_I_fix_non-uniform_image_scaling?
https://commons.wikimedia.org/w/thumb.php?f=EPA+Deputy+Admin+Bob+Perciasepe.jpg&w=100
https://commons.wikimedia.org/w/thumb.php?f=EPA+Deputy+Admin+Bob+Perciasepe.jpg&w=200