The corset or bodice be the key element of a lady pirate outfit. It should be the first item ye pick out, then get the blouse n' skirt to match it. This item will give ye that perfect hourglass shape. Most of these corset n' bodies arrr designed by Pirate Fashions n' available no where else in the 7 seas.
There be a shipload of info about how to pick a corset, bodice or waist cincher, how to measure fer a corset n' the difference between a good vs cheap corset on this Corset Info Page.