Good morning Dear
As per your query you are concerned with your anterior teeth.
Sometime anterior teeth are little maligned and they looks pretty big.
My advice is you should visit your dentist and if your teeth are not aligned or outside than you can go with braces.
Other Option is you can go with Crowns.
Lot of things. Genes,dna. your ancestor history of teeth. Widening of arch cannot be done naturally. But there are appliancesa few by dentist available to cause widening as per the skeletal to dental teeth relation .habits which you had when you were a child. Like thumb sucking. Kindly visit a nearby dentist to assess your problem better.