Branching Out Card-io Combinations Clear Stamp Set. All clear rubber stamps in the Card-io collection are made from high quality, non yellowing 3mm thick clear polymer. All of the stamp sets are about 4 inches by 6 inches. Branching Out Clear Stamp Set; 9 Autumnal branches including; 4 sizes of Curly Christmas Tree branch, 2 Berry Branches, Fir Branch Chunky Fir branch, Leafy Branch.