Julie recommends saving the images and then importing them into a Microsoft Word document to print. Set the layout of the page to landscape and then size the two JPEG images to 8.5 inches wide, and the ornaments should be just right to fit a 2.5 inch square pocket on the advent calendar.
I am also making a few different ornaments, so I'll post templates for those when they are ready. This should give you plenty to work off of in the meantime! Thanks again to Julie for sharing her work - you can check out her other crafts at her blog, Little Jack's Corner.
Also, many of you asked how large to cut your tree. Mine is basically going to be about 17 inches wide at the bottom and approximately 17 inches at the tallest point. The shape is still to be determined. I like the simplicity of the Inchmark design, but am also drawn to this whimsical tree shape from Pottery Barn Kids:
The beauty of sewing your own advent is your tree can be as big as you want, in whatever shape you want! Go crazy. Mix it up. ;) Can't wait to see what you all create.