Is there any surgery to make my ears bigger? (Photo)

It looks like the top of your ear is shaped in a way that makes it look disproportionately smaller and pointed. This can be corrected with otoplasty.

and if you want them larger, reconstructive procedures with scarring and some unpredictability can be pursued.  As mentioned, it appears like a lop ear and your existing tissue could be made to expand moer and appear more normal.  This is not a common procedure so find someone with a lot of experience.  And finally, you can preserve your uniqueness and use your hair to cover and not worry about this... 

Thank you for your question. It appears that you have a common congenital ear deformity that involves folding of the superior portion of the helical rim...often referred to as a "lop ear". These are ideally treated in infancy with ear molding, which is very successful in non surgically correcting this deformity. As an adult, it is a little more challenging to correct.  It involves surgically unfolding the helical rim and sometimes requiring cartilage grafting to keep the shape and elevation of the rim. This will give the appearance of making your ear "bigger" because the height of the ear is increased.Ear reconstruction is complex. Seek consultation with a board certified plastic surgeon who is experienced with ear reconstruction. Good luck!