Wheel cylinder problem

Anyone know correct wheel cylinder size for 1 ,1/16 master cylinder (not for 1 inch bore)

I recently upgrade my single diaphragm booster and 1 inch master cylinder to dual diaphragm booster with 1,1/16 inch master cylinder first 2 days it was very good hard as rock  but after suddenly I felt soft spongy brake paddle, But if I replace my 15/16 wheel cylinders it will fine for 2 or 1 days. So I want to know correct wheel cylinder size for 1 ,1/16 master cylinder.
I think 15/16 wheel cylinders for 1 inch bore master cylinder

Any help or Advice plz?