The least invasive way would be to have orthodontics (braces) to widen your smile. This could take anything from 6 months to 2 years. The advantage would be that if you are happy with your shape of teeth this would just put them in a better position without the need to prepare the teeth (remove healthy tooth structure). The other option would be to have veneers to widen your smile. This would produce better shaped teeth and we could tailor the design of your smile to how you want it, you could also go whiter in colour with this method. The time frame would be quicker to produce the result you wanted – around 1 month but the only disadvantage would be your teeth would need to be prepared.