The following site is a great resource for discovering your body shape and how to dress in order to flatter your shape. This link even features a body shape calculator where you can enter your body measurements to accurately determine what shape you are. Check it out! http://www.shopyourshape.com/
After considering factors such as color and body shape, start to consider some interview suits that will fit what you are looking for. Here are some sources to consider:
http://www.tjformal.com/48692/Pageant-Interview-Suits.html
http://royal-we.com/index.php?option=com_content&view=article&id=9&Itemid=9
http://www.serendipityprom.com/pageant-suits.php
If you aren’t sure what to look for in a pageant interview suit you may want to check out this classy skirt and jacket set below and see if an outfit like this would work for your competition: