I want to increase my chin size about 0.5 cm vertically and horizontally, is there any exercise ?

I have not heard of any non surgical treatment to be predictable. I think the best option is sliding genioplasty with grafting. 

To augment the chin requires a chin implant since the mandible is  bone and the implant works by extending the shape of the bone itself. Chin implants are composed of Silastic, are inserted under local anesthesia as an outpatient surgical procedure. Chin implants are manufactured in a variety of sizes and shapes which is best determined at the time of the consultation, and can even be custom carved according to the patient's needs and requirements. For many examples and more information, please see the link and the video below