I've used old x-rays and several years ago at our local hardware store they had packages of 2 sheets of what I call template materials for .50 so I bought a couple packages, but wish I would have bought more. For marking, I use a permanent fine line marker, for slippage, I use the medical tape, it seems to work fine for me. I've used a hole punch to put holes in the templates so I can put pins in it to hold so I can cut with scissors. You could also have it on the fabric and mark the fabric then cut. You could also put the template under a ruler and use it that way.