Fabric Ottoman

Having promised Jenni I would finish the gold blouse and wear it to my multiple Christmas parties, I instead have started plotting a new project which is a fabric Ottoman something similar to the Amy Butler Gum Drop cushions in large format.
I don't really want to buy the Amy Butler pattern as it is not quite what I want but its sparked some ideas....
I plan to make mine out of several co-ordinated unholstery fabrics - probably in shades of cream to be neutral and not clash too much in various room furnishings.
Here are some ideas, just have to find some instructions somewhere.