If you're thinking of making this purse, then do yourself a favour, and follow Sian's sewalong. It's really easy to follow, and completely idiot-proof. The only change from the original pattern is to add two zip pockets instead of one.
My fabric is what was left over from my Exploding Tardis's dress. I had 111.5cm wide and 53cm long of fabric left, and got everything except the card slots cut from the tardis fabric. The card slots are some left over (Tardis) blue chambray from my Kelly skirt.