I agree with yonnikka on this one. I also see 5 columns that appear to be the same width but I also see 4 different sizes of blocks in height. So if you use a 12" square block (for the ones that are square), you would than use a 12"wide by 8" tall, a 12 by 10" and a 12" by 14" for the 4 block sizes. That way when you place them in the quilt setting she has they still come out to 60" square quilt.
12" x 5 columns = 60" across
columns #1 & 5 would have (top to bottom) 8", 12", 8" 14" 8", 10" totaling 60"
columns # 2 & 4 would have (top to bottom) 12", 8", 12", 14", 14" totaling 60"
column #3 (center) would have (top to bottom) 14", 8". 12", 14", 12" totaling 60"
that would give you a square quilt of 60" and all you need is a binding.
you are on your own to figure out how she planned the strips. LOL
Hope this helps you see how easy it was to make this quilt.