My base card began with an 8 1/2 x 4 1/4 piece of Pool Party card stock which was scored with my Stampin Up! Simply Scored Scoring Tool at 5 1/2. The smaller card was cut to 8 x 4 and scored at 4. I love our Stampin Trimmer (126889) for projects like this, dont you? Fit them together and voila!