I created the base of this card from scratch so it took me a couple of goes to get it exactly as I wanted it.
I laid out a sheet of A4 purple card (297mm x 210 mm) in front of me in the portrait position and drew a line all the way down the right hand side; 6.5cm from the right hand edge of the card. From the top, I then measured down 3.3cm, 6.6cm and 18cm, and drew 3 lines at right angles to my first line, across from the first line to the right hand side of the card. - these were my scoring lines for the step on the right of the photo. Next, using a steel ruler and a craft knife, I cut along the first line that I drew, from the 3.3cm mark down to the 18cm mark. The 3 lines were scored as far as the cut line, and then the remaining side of the card was scored in half (14.8cm); again only up to the cut line.
I laid out a sheet of A4 purple card (297mm x 210 mm) in front of me in the portrait position and drew a line all the way down the right hand side; 6.5cm from the right hand edge of the card. From the top, I then measured down 3.3cm, 6.6cm and 18cm, and drew 3 lines at right angles to my first line, across from the first line to the right hand side of the card. - these were my scoring lines for the step on the right of the photo. Next, using a steel ruler and a craft knife, I cut along the first line that I drew, from the 3.3cm mark down to the 18cm mark. The 3 lines were scored as far as the cut line, and then the remaining side of the card was scored in half (14.8cm); again only up to the cut line.