I've been really wanting to buy a damask stencil (like the ones seen on GSA)

http://www.globalsugarart.com/product.php?id=23052&name=Damask%20Side%20Stencil%20by%20Designer%20Stencils

will these stencils work on round cakes? I wasn't sure how they would work on a round, on the GSA website they only use square cakes. Any advice?

I would think they would work the same way an impression mat does. You just move it to the next section. In my experience they are very flexible. Good Luck.

i have not used them myself, but, yes, they work on round cakes. there is a tutorial , here , on c/c on these stencils.
also, on their site. hth