Could I have thinner legs with surgery?

A Cordial Greeting Kitty
The first thing you should do is to consult with a certified plastic surgeon because we do not know what you really need if you do not show a photo, but there are several procedures depending on what your surgeon recommends.
*Thigh Lift - Thighplasty
After a thinning process, after a pregnancy or due to aging, the skin loses its elasticity. The skin on the upper legs becomes flaccid and wrinkled, folds may also appear.
Leftover skin can cause limitations, both aesthetic and functional. Due to the excess skin, walking may cause irritation of the skin between the legs. A thigh lift (also called a thigh lift) can offer a solution.
In a thigh or thigh lift only the skin and the subdermal tissue are removed. With a liposuction-liposculpture we can eliminate any excess fat. Both interventions are performed during the same surgical session.
Alway To Serve you, Dr. Manuel Ventura 
Certified, Medical Research Institute of Plastic Surgery in Sao Bernardo do Campo, Sao Paulo, Brazil.

Hello and thanks for your question.
 localised fat deposite in lower body makes leg heavy  inspite of loosing weight. Liposuction stubborn fat from thigh, calf ,butt   can make your leg really thin.
please consult board certified plastic surgeon and discuss bout the pissibily of getting thin legs
 Best of luck.
Dr Milan Doshi