Are there any non-invasive options for treating cankles and big calves?

In my opinion there's no non-invasive treatment (other than weight loss) that will affect the shape of large lower legs (so called "cankles").  Be sure to discuss your goals and concerns with your board certified plastic surgeon and consider the pros and the cons. Be certain your surgeon is properly certified.  I've attached a link where you can start your search. 

There are no effective non invasive treatment for the ankles and calf that make a significant improvement. Your best option is diet and exercise.

Dear Star, Thank you for posting your interesting question. Liposuction can safely and effectively treat "cankles." Unfortunately, we cannot spot reduce fat in our body like we can build up muscle. However, liposuction can. I recommend that you have a consultation with a Board Certified Plastic Surgeon who is experienced with calf and ankle liposuction, because it is a specialized area of liposuction. At the time of your consultation, you will ave a detailed physical examination, have all of your questions answered, discuss your goals,and carefully review dozens of the plastic surgeon's before and after liposuction results. Best wishes, Richard Wellington Swift, M.D., F.A.C.S.