This next step, prototyping, is optional but recommended, especially if you have altered my design or chosen to create your own design. If you're creating a carbon copy of my design, prototyping isn't absolutely necessary.
Prototyping may seem excessive in both time and materials but it's very useful. A good design can go through many iterations and prototypes before it is finalized. While most people outside of the professional world don't have time or resources to prototype that many times, I would recommend at least testing out your design once in scrap fabrics before moving onto final materials.