Modul:Message box/tmbox.css
/* Cell sizes for ambox/tmbox/imbox/cmbox/ombox/fmbox/dmbox message boxes */
th.mbox-text, td.mbox-text { /* The message body cell(s) */
padding: 0.25em 0.9em; /* 0.9em left/right */
}
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 */
}