~~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 Crazy Crafts
by HLSS Media
by Arthur 3D origami
by EasyCrafts DIY
by Zara's Origami
by ORIGAMEANDO ando!!!
by Craft Haven