Depending on what you have in mind for a final result will dictate the best way anybody could achieve it. If you only wish for a larger areola area with no surgery, tattooing is a very good non surgical technique to do this. If done by a specialist who knows about nipple areola tattooing, they can create very clever 3D looking results. If surgery is an option, breast augmentation would help to stretch out the areola, otherwise as advised, you would have a circumferential scar around your areola, so the trade off would be a bigger areolar but you would gain a scar.
Best of luck with your quest.