It more than covers the double spare bed and will be good for the King size in the other room. It cost £30 - heirloom wadding, thread, pins and machine needles. The patchwork is cotton left overs from "the stash" - 80% new fabric and 20% recycled, previously loved, fabrics. I used an old IKEA duvet cover for the backing but then put a coloured backing on it. The back which comes round to make the border is a polka dot double duvet from the charity shop £3.50.
It is not ultra accurate but I wanted something bright and casual (?). I might try a patterned quilt one day and work on the accuracy of cutting and matching seams. At present it is nice to have something so colourful instead of pale walls and white duvet covers! In my older age I think I am going far more towards bright and beautiful thing. Do your tastes change? I was on the bus the older day with 3 or 4 older women all in beige with grey hair - I immediately wanted to dye my hair bright pink and I was glad I was in my purple coat with turquoise scarf.