Template:Mbox/styles.css

td.mbox-image {               /* The left image cell */ padding: 2px 0 2px 0.9em; /* 0.9em left, 0px right */ } td.mbox-imageright {          /* The right image cell */ padding: 2px 0.9em 2px 0; /* 0px left, 0.9em right */ }