Corsets are intended to cinch down several inches. We recommend that your order 4-7 inches down below your natural waist measurement to allow for cinching. Plus sizes (waists of 38" or more) should order 6-9 inches down. So if you have a 29 inch waist, we would recommend that you purchase a size 24. A size 24 will have a 24" waist when fully laced shut. The bottom edge will measure about 6-7 inches larger than the waist, and the underbust is about 4 inches larger when laced shut.
See our sizing page for additional information.