Don't quite need the ottoman but this might work for the bench I'm looking to do. How to Build an Upholstered Storage Ottoman. This gives you the measurements of every piece of wood and fabric along with a list of what tools you will need.
DIY Storage bench - great idea if you have a kitchen under first window. Add cushion, use bench as seating. Put bench against wall, push table against wall, great storage for occasionally used kitchen things.