For the backside of my 'Oh My Stars!" blanket I've had bought about 3.2m of blue fabric in the assumption that this would be enough. Well, as I turned out, it wasn't, so I had to improvise a little and added some stripes of white at one side.
I also did a bit of decoration in my living room where I always had an empty area of sky blue wall. I found the butterflies at Ikea and knew that this was it. I really love my swarm of butterflies.