First, purchase a UPC bar code in the project quoter. If you're doing design off-line, plan ahead for where your bar code will go. It doesn't need a white box, just an area with no critical text or images. Size of bar code is .5" tall by 1.25" wide. After the screen where you upload your artwork (or create it if you are using our designer), you will be taken to a screen that allows you to choose the location for your UPC bar code in your artwork.