The limit for liposuction performed in an office setting (there is no such limit for hospital based surgery) is 4-5 liters of lipoaspirate. A liter (assuming equal fat and water density) is 2.2 lbs. Thus 4 liters is equivalent to 8.8 lbs. However, it is important to remember that lipoaspirate is a not purely fat but rather a combination of fat, tumescent fluid, blood, and miscellaneous aspirated tissue. The fat component may only represent 50% or 4 lbs. of the total. As you said, liposuction is not a means to weight loss. The optimal candidates have reached a healthy stable weight (preferably with a BMI < 30). They have one or more areas that have been resistant to diet and exercise and are in need of contouring. Think of liposuction as a surgeon's sculpting tool or chisel. It is designed for fine detailing not wholesale demolition. Anecdotally speaking, I have rarely (if ever) had to aspirate volumes approaching 4 liters. I would venture to say that those patients in whom high volume liposuction is performed would have perhaps been better served by pre-operative weight loss. With regards to your specific question, you sound like a reasonable candidate for surgery but there is a limit to what can be said without photos or an in-person exam. The optimal liposuction candidate has reached his/her weight plateau and is seeking to address one or more areas which have been resistant to traditional diet and exercise. In my experience, these patients rarely require 4 liters of aspirate. As always, discuss your concerns with a board certified plastic surgeon (ABPS).