Can Porcelain Veneers Make Small Teeth Look Larger?

Porcelain veneers are the best and most aesthetic way to correct teeth that are too narrow for your mouth.  These types of cases can be done very conservatively as far as the amount of tooth structure that needs to be removed. Many times these can be done without removing any enamel.  The key is to make sure that you place the porcelain veneers on all of the teeth that show when you smile.  For most people this is between 8-10 teeth.  Doing less would give a less than desirable result.  Your case could probably be completed in just two visits.  If your small teeth are a result of excess gum tissue , then a laser could be used to remove the extra gingival tissues further enhancing your final result.  Good luck.

Absolutely!!  One of the many perks of veneers is exactly that, to make teeth look longer, to improve the overall shape and look of the teeth.  Depending how small/short your natural teeth are, if they're super ground down or super short, then maybe crowns will be indicated.

Sorry to write a simple answer to your question, but you really need to give a photo to show how your teeth are small and the relation between their size and the gaps between them. A smiling photo, a resting photo and one where your lips are moved out of the way. 
What is possible and is needed is really a relation between the size of your face and the size of the teeth, and the gaps between them determines if veneers or aligners are most appropriate. 
Hope this has been some help. 
Kind regards
Thomas Dey, BDS, MSc

Veneers are a great way to change the size, color, shape and width of your teeth and smile. Everything should be proportionate and work with the aesthetics of your face and features. When we take photos and impressions and send them to the lab we can get "wax-ups" and you can actually do a trial smile before you start your procedure. There are many checkpoints along the way, along within when you are wearing temporaries to ensure that your teeth look great and are the right size for your face. Best of luck to you!

Yes, you can design veneers to look larger than your existing teeth. It is generally advised to take study models of your teeth and perform a waxup of your teeth, made to look larger, so that the proportions can be properly analyzed and to make sure that they will be appropriate in terms of function. But yes, you can definitely make them look bigger than your existing ones.