Catherine Pooler - Slimline Die - On The Rocks. Designed to mirror vintage patterns on the bottoms of low-ball glasses is the funky On the Rocks Slimline Die. This 3.5' x 8.5" die works perfectly with the CPD slimline card format. This die is sized to fit our recommended 8.5" x 3.5" base slimline cards. Tip - Cut it out of heavy weight cardstock or acetate and create your own stencil. Catherine Pooler dies are made of stainless steel and are compatible with all standard die cutting machines.