The easiest one shoes a paisley card with one diagonal slice. Can't miss with that. One fold, one cut. I'd love to see a fabric origami maniquin. I haven't done very large pieces.
Origami is basically a very small and intimate object.
But there are people who have made huge pieces sorry if i was out of turn, i was lagging. I remember seeing elephants folded this way. If you wish to make a larger box, use a coarser fabric. The coarser the fabric the stronger the box. The finer the fabric the tighter the creases.