Is there anything that would help my eye? I noticed when I smile or anything one eye is always smaller than the other.

Eye asymmetry has many causes. It could be your right eye is more sunken. One possible noninvasive treatment could be botox injection to right lower eyelid so it doesn't get raised as much when smiling. You can see examples on link. 

The picture suggests you right upper eyelid ptosis.  However, the quality of the photo is so poor, I recommend either reposting a better photograph or simply getting personal consultations with an oculoplastic surgeon.

and if you look closely at other people, you will always find some asymmetry as eyes are never level, nor are they perfectly equal in size with smiling.  Surgery can always be done to alter things but it can also cause a more appreciable asymmetry so be careful of what you ask for as your results may be worse than what you started with.

Hello Maddy133,It appears you have a slight slippage of your eyelid muscle on your right upper lid. This is called ptosis. A simple surgical procedure could help you balance your eyes. My suggestion is to seek out an expert oculofacial plastic surgeon to have this discussion. Hope this helps.Cheers

Good question. Your eye appearance is very normal. Every paired structure of our bodies is asymmetric to some degree, and our eyes are no exception. Differences in the position of the eyelid, distance from the eyelid to the eyebrow, development of the eye socket, position of the eyeball (front to back), and muscular function are all variables that may affect how open the eyes appear. There are multiple surgical methods to adjust these variables to improve symmetry, some able to be performed awake under local anesthesia, others better performed asleep. Nonsurgical interventions will have little potential for improvement. I would recommend consultation with a board-certified plastic surgeon to talk about options.