~~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 Amazing Easy Origami - Yakomoga
by Ankhang Handmade
by Origami World
by Mizyaka Dizyaka ENG
by ZIZ origami
by razcapapercraft
by Origami Diana