Just for an idea of size.
Had a mega-Origami day on Friday and folded pretty continuously throughout the whole day. `synconi
taught me how to make a Kawasaki Rose, but I haven't quite perfected it yet
I followed this
tutorial. It took me 1 hour of folding and I used 18
sorry, 3cm squares of paper. Modules are relatively easy to fold and put together, and the result is a ring with a fairly sturdy feel to it.