Please see the spec sheet located on the individual product page to assure proper fitting of each item.
For the best fit, measure the fullest part of the bust and buy according to the chart. If you midriff area is larger in proportion to your bust, you may want to buy up a size just as you would at retail. If you are smaller in proportion to your bust, you may buy a size smaller; however, the shirt will be snug across the bust.
Most products fit the same as what would be purchased at a retail store.
Specification Sheets can be found on each product under the "view size chart" link. Simply click on the link to view details for measurements, sizing information and care instructions.