This is a question with answer options. Goal: How to secure a rubber to the back of a pencil?

Which of the following methods is more reasonable for accomplishing this goal?

Pick your answer from: -- slice the rubber to your desired size then place it against the end of a pencil with some rubber glue to secure it; -- slice the rubber to twice your desired size then place it against the top of a pencil with some rubber glue to secure it;...I think the answer is
slice the rubber to your desired size then place it against the end of a pencil with some rubber glue to secure it