When trying to decide between two sizes, choose the larger size for a better fit.
 SizeChestWaistHip
One size(OS)4-1231, 1-39, 76 INCH24,41-33,46 INCH34, 65-42,52 INCH
One size(OSX)12-1840, 16-49,21 INCH33,86-41-34 INCH42, 91-50 INCH