Which Procedure Will Give Me a Smaller Waist
A tummy tuck will remove excess skin and tighten the abdominal wall, reducing the protrusion of the abdomen, and providing some more waistline definition.
An 8 inch reduction would be an unreasonable expectation. If that is your primary objective, a careful discussion with your surgeon is in order.
If your weight is above your pre-pregnancy weight, getting back to that level will improve your outcome. Liposuction may add some definition to a tummy tuck, but will not serve you well without that tummy tuck.
When you are ready for an in person consultation, RealSelf has listings of surgeons in your area. You should consider cross referencing the listings from the The American Society of Plastic Surgeons (plasticsurgery dot org).
A listing in the ASPS website assures you that your surgeon is not only board certified, but also is a member in good standing of the major plastic surgery organization in the U. S. (Jourdan Gottlieb, MD, Seattle Plastic Surgeon)
Liposuction in Tummy Tuck to make the waist smaller
From your photographs it appears that your skin tone is good but that you have some excess fat beneath the skin. Of the photograph it appears that liposuction to remove excess fat will have the greatest impact on the measurement of your waist. However following liposuction there may be skin laxity or looseness which would require a Tummy Tuck.
I’m guessing from your photograph that you do not have enough loose skin to justify a full Tummy Tuck, and a full Tummy Tuck would be required to tighten the muscles. To pull your waist into a thinner profile. Be sure to consult a plastic surgeon who is certified by the American Board of Plastic Surgery, is experienced in body contouring, and has an excellent reputation in your community. (Brooke R. Seckel, MD, FACS)
Diet first then a tummy tuck
Get rid of the extra weight and then have a tummy tuck. You may never get back to the 25″ waist – remember what you weighed then and then think of what you weigh now. You need to be realistic not just wishful. We do great work not miracles. (William B. Rosenblatt, MD, New York Plastic Surgeon)
Abdominoplasty with liposuction
An abdominoplasty (tummy tuck) will allow for the tightening of the skin as well as tightening of the abdominal wall to create significant changes in your waist size. Liposuction, in addition to abdominoplasty, will further refine the flanks to achieve a much improved waist contour. (Erwin Joseph Bulan, MD, Short Hills Plastic Surgeon)
Dream waistline
It would be helpful to know what your weight was pre-pregnancy because this is certainly a contributing factor in the size of your waistline. I agree that you need an abdominoplasty with liposuction. However, 8 inches may be unrealistic. See a board certified plastic surgeon who can discsuss the options with you. (Robert L. Kraft, MD, New York Plastic Surgeon)
Reducing The Waistline
You would do well from a combination of abdominoplasty (tummy tuck) and liposuction. While this will improve your appearance, it is doubtful that it will reduce your waist from your current 33 to a 25.
This will most likely require for you to achieve a pre-pregnancy weight which includes a component of exercise. I would recommend that you consult with a Board Certified Plastic Surgeon for an in-person examination and a discussion of your goals. (Pedro M. Soler, Jr., MD, Tampa Plastic Surgeon)