The flatter you make them the crunchier they will be.
For additional crunch, bake for 2-3 extra minutes (but watch closely and remove them as soon as the edges start to brown).
Metric kitchen scales are an inexpensive yet invaluable gadget to enable accurate measurement of ingredients. Store them upright in a cupboard or over your worktop and they'll only take up a tiny bit of space. Click
HERE for the ones I use (UK Link). For U.S. option click
HERE.