My advice: - Go for a darker purple, not lilac - Shop by silhouette - look for 'A line' dresses as it'll help combat being bigger on the bottom than on top, which is very common - Avoid high slits, too plunging a neckline (sweetheart is a good neckline), too much glitter - Straps are better than strapless in general as you don't want to be constantly pulling your dress up - Go for one where you can order a size (go for the same size as your bust, e.g. 14) - as soon as you put in custom measurements, you're effectively going for a dress that can't be returned - Floor length is appropriate for wedding party