What do i do about my foot slipping around in my basketball shoe?

I just got a new pair of basketball shoes and i think ive realized in the past couple years that my right foot is slightly smaller than my left foot, and its become apparent in this new shoe. My foot seems to slip, slide, and turn in the shoe. I was wondering what i should do? My friend told me to wear an extra sock but i don't usually do that because it gets uncomfortable. Any solutions?What do i do about my foot slipping around in my basketball shoe?
Stuff something in the from of it, so it's tighter to your foot.

Or, like Kirby said, get a thicker insole.What do i do about my foot slipping around in my basketball shoe?
you could get thicker innersoles for the shoes.