help- do i have 9 or 10 inch drums, and what about shoes???

take the wheel off. unscrew the hubnut. take the hub off. grab a tape measure and measure it across the inside of the hub. if you still cant figure it. go to your local parts dealer and they can help you out.

We cant help you out with no info on your car. What model is it? what year is it? what motor? need info