I have small lateral incisors. Is there a way to make them bigger, or would I need to have my front teeth shaved down? (photo)

It is a combination of both. There needs to be a smile analysis, to check the height and the size of those teeth, so we can change shape, size and color with porcelain veneers. And its important to know that those teeth can look more natural, if you make a wax set up, i think you will end up sooner or later with 4 new veneers. I hope this helps.

Your front teeth are too long with the present veneers.  I would ask your dentist to shorten them to that they are even with your canine (eye teeth).  They wil look much better then.

It appears that the veneer is wider than the other central incisor. It also appears that both your central incisors are too long and wide for your mouth. You also appear to show a little excess of gum tissue above lateral incisors, especially your right lateral incisor. If you really want the best smile you can have, my recommendation would be to have the gum line brought up above the lateral incisors to the correct height and then have porcelain veneers placed on the front four incisors to then have all four more proportionate, width and length. It would also be advisable to whiten your teeth if you haven't already before you have permanent restorations placed. Find an outstanding cosmetic dentist to help advise you on these options and get your best smile. Good luck.