|Carolann's crane: 5mm|
To make origami so small that it is measured in millimeters, I highly recommend using tweezers. My daughter also suggests using small sticky note squares. Starting off with a true square makes a big difference especially at this challenging size. This probably would have been a little easier if I had used my paper cutter rather than scissors.
|My 9mm box and Carolann's bitty crane.|
|Both boxes (one is a lid)|