I now have 3 NYDJ's skirts.  They all fit the same.  I know that there is the idea of ordering a size down coming from advertisements along with some buyers.  I wear a 4 and that is what I purchase.  A 2 would never work.  The skirt fits nicely but can ride up a bit around the hip area where there is the "lift/tuck" technology with plenty of room to spare otherwise.  I would hesitate to buy a size smaller since like other manufacturers, it seems as though they are cutting back on quality by using less material and/or sizing differences based on item color.  I would think twice about getting a smaller size unless you have the time to return the item.