Ok, thanks!

Do you think these would work well? https://www.amazon.com/Stencils-Reusable-Template-Material-Compatible/dp/B07XXY93YS/ref=sr_1_4?dchild=1&keywords=clear%2Bplastic%2B12%2Bx%2B12%2Bcutting%2Bsheets&qid=1608055768&sr=8-4&th=1

They are 12'x 12', and they are 6 "Mil" thick.