Watch this video to learn how to make a stunning diamond topped 3d card from a single sheet of A4 paper! 1. You'll need one A4 sheet of paper and some printed papers to decorate. 2. Score at 10. 5cm across length and 10. 5cm from one end. 3. Crease both scores in the same direction (mountain folds). 4. Turn card over mark 13cm from top on centre line an 17. 5cm from top on both edges. 5. Score from central 13cm mark to 17. 5cm mark on each edge. All printed papers used in this tutorial are available for you to print on Paper Printables.