Hydrangrea Hearts 1, 2 and 3 (Meenakshi Mukerji)

Paper:
Hydrangea Heart 1 (left): square with a side length of 24 cm (9 1/2 in)
Hydrangea Heart 2 (middle left): 24 cm by 18 cm (9 1/2 in by 7 1/8 in) rectangle of kami
Hydrangea Heart 3 (middle right): square with a side length of 24 cm (9 1/2 in)
Hydrangea Heart 4 (right): square with a side length of 24 cm (9 1/2 in)

As some have asked what the difference between the four models is, here is a side-by-side view from similarly sized paper. Hydrangea Heart 2 uses a 3:4 rectangle, so it's a bit smaller.
Each is folded from the related Clover Heart design by shaping the central clover into Shuzo Fujimoto's hydrangea. View the posts on the individual models for links to instructions and further details.