When I went into David's Bridal for my first wedding dress trying on experience, they asked me my dress size and I had no idea because I never wear dresses lol. So, they then asked me my jean size (apparently it's about the same). They also said dresses tend to run small and most women need a size or two bigger than what they usually are. Take me for example; I usually get a 16/18 for my jeans and pants...but in a wedding dress, I need a freakin 20/22 ! Yeah, it is a bit of a blow to your self asteem but just try and remember that you're not actually that bigger size lol. I almost went into tears in the dressing room until the assistant helping me explained the whole dress thing lol.