Each product page at Printkeg.com provides the appropriate downloadable template that may help graphic designers visualize bleed area.
On our blog, we offer a full list of PDF templates for you to paste art into ensuring proper bleed areas, cuts and sizes. If you are ever in doubt, we have a “Just Make My Graphic Work” option under Custom Design. These are the exact same templates we offer during our proofing process. Unfortunately, they only work with Photoshop, Illustrator and InDesign.