The shoe in the Cinderella story is significant in multiple ways. Firstly, it represents Cinderella's transformation from a servant girl to a potential princess. When she wore the beautiful shoes at the ball, she was in a different role. Secondly, it serves as a test. Since the shoe was so small and delicate, only Cinderella could fit it. This made it a perfect way for the prince to distinguish her from all the other women. It also adds a touch of magic to the story, as if the shoe was made specifically for Cinderella and their love story.
You could look on DVD rental stores or even check your local library. Sometimes they have a collection of movies like 'A Cinderella Story: If the Shoe Fits' that you can borrow.