I have a huge collection of stencils in all sizes I have been accumulating for years. I haul out my pile and start laying them on the quilt. When I find one I like, I use a water soluble blue pen to mark it with the stencil. I have burned and also cut custom ones when there wasn't one for sale that I liked or that fit the motif. Once I made kangaroo and emu stencils for my son's quilt by printing off pics from the internet an tracing them onto burnable stencil plastic. And just a couple of days ago I enlarged one I liked, but that was too small.