Sellers of handmade goods are expected to adhere to these principles regardless of the size of their businesses, which may range from a single person shop to a designer who partners with an outside manufacturer. An “outside manufacturer” is anyone with whom you partner to create your designs, including providers of any of the following services: printing, 3D-printing, casting, plating, engraving, cutting and sewing, assembling, and any other production-related process.