For labels in here, you need to figure out what size to print them at
so that they come out the right size to fit on existing shields etc.
For instance, when I printed out labels01.jpg at 20x25 cm in size,
the stickers were a hair too big for the shields (only about 1mm),
but still worked with slight trimming. So that sheet should be printed
out maybe about 19.5 cm wide or something instead of 20.

Don't just blindly print them out on sticker sheets or else you'll
waste a lot of sticker sheets. :)

The sticker sheets I use are the "White Full Sheet Labels" from
Avery (Avery #5265) available for about $10 (25 sheets) at Staples.