~~30 Units~~ ~Paper used is 2:3 ratio rectangle.~ You can find a tutorial on how to cut square paper into proper size for this kusudama here - ... A tutorial on how to make the Whirlpool kusudama designed by Ekaterina
by Paper Folds - Origami & Crafts !
by Arthur 3D origami
by enjoy paper! origami tutorials
by NProkuda
by happypuppytruffles
by PRIKNOWtomakeit