Since my 'hijab styles to suit your face shape' post I have had TONNES of e-mails from sisters telling me they have a round face and nothing suits them. Since I have been replying to each message individually telling people pretty much the same thing I thought I will do an update post for sisters who think they have a round face or chubby cheeks.
So one of the main mistakes I see people with this face shape making is tying their hijab really tight around their face and trying to tuck their cheeks in, as I said in the other post this only makes your cheeks stand out more. Try to go for loose drapey styles which skim the sides of your face rather than tight styles that bring your cheeks forward. See some examples of the style I'm talking about below...
Another thing you may want to try is to wear your underscarf/headband higher up on your forehead just below your hairline rather than have it going straight across your forehead. Avoid styles which go behind the angle of your jaw or pinned tightly under your chin, these also make your cheeks come forward.
If you want to cover more of your face you can do, just make sure your hijab is not tight.
So that's the only advice I can give you really. Please remember these are just my opinions, find something that suits you and that you are comfortable with, people will always say things to discourage you but inshaAllah have faith in Allah and remember why you want to wear hijab.
[No copyrite infringment intended, all images for demonstrative purposes only]