For punk short hairstyles you need to incorporate an unusual hair color such as fluorescent pink, green or blue. You can also only color sections of your hair or your whole head. It is possible to do color stripes, color the tips of your hair or just the bangs. The color needs to stand out so if you have very dark hair then platinum blond tips are a good choice. The main factor when getting a punk cut is that it should not be any cut that is considered mainstream. This can usually be overcome by having unusual configurations such as long shaggy hair on top and a short buzz cut on the bottom. Asymmetrical cuts also work. It is also very typical to have words shaved into your head.
Round faces are different from chubby faces and differ in the facial features also. Basic geometry of the two kinds differs vastly from one another. A round face would have the perfect round shape with the length and the width of the face reading the same size while a chubby face might have extra cheek fat or extra fat due to body fat. Oval face shapes are the ones that would go with any kind of hairstyle. So one has to be very careful in choosing short hairstyles for round faces, as a wrong choice would make the face look more round and chubby.