Formal dresses typically run smaller than regular-sized clothing. It is not unusual to have to go up one or two sizes, depending on style, cut and fabric. Because of this, it's important to order your dress based on your measurements, not the numbered clothing size that you normally wear.
How do I know my formal dress size?
For dress sizing, be sure to measure across the fullest part of your bust instead of relying on your bra size. Waist: This is considered the smallest part of your body between bust and hips, and it typically falls about 1 inch above your belly button.
Are formal dress sizes different?
Because so many bridal gowns are made to order, there are no set rules for bridal sizing. Different brands size differently– one gown's size 8 may be equivalent to a regular size 8, or it may be equivalent to a regular size 2.