Steering Wheel Question

Is the 15 inch better to have than smaller wheels for us manual steering guys?
I had an old 50's car with manual and a gigantic wheel and it didn't seem to make any difference. I think the steering box may make the difference.
My car now has manual. The key is to steer the car back the other way when backing up and parking. That way I'm not fighting it turning it from one end to the other.