http://www.flickr.com/photos/firstfold/
Initial paper size: 19.5cm by 9.75cm Finished model: approximately 5cm diameter, 2.5cm height
The picture shows eight positions of the model in action.
http://www.brilliantorigami.com
"Brilliant Origami" by David Brill
folded from 24 sheets of A9 paper (37.25mm by 52.5mm) Finished model: approximately 9cm diameter
"Fabulous Origami Boxes" by Tomoko Fuse