<a class="link link--internal" data-proxy-href="/proxy.php?link=http%3A%2F%2Fblackdahliaroleplaying.com%2Findex.php%3Fmembers%2Falchemy.8%2F&amp;hash=c081fde443968ef17f6c49920876c3f2" href="http://blackdahliaroleplaying.com/index.php?members/alchemy.8/">Alchemy:</a>I did 1200x300 for mine, but I believe the code auto resizes the width of any image uploaded, and just cuts off the height. 1000x300 would probably be a good bet too.