That's what I call multi-tasking. I'm pretty sure I got the numbers correct since it comes up with the same number of blocks both ways. There are twenty-five 4" blocks across and down so that's 625 and adding up all of the different 4" blocks comes up to 625. The quilt size is 100"x100". With 3 blocks x 4 blocks it would be 76"x100.
The parts are all very simple, straight seams.
This really doesn't look hard at all other than having so many small pieces.