I tried this download and only got fabrics needed, and to cut into 8 7/8" squares. Can only guess one must make HSTs ( 95 or 97 sqs of all 4 colors). There is a quilt-along here where you can go to each block. You could make the HSTs any size you like I imagine - smaller blocks just means more work. This might be one for my 'one day' list.
Going by the size - 98x130 - each HST is 8" finished.
https://quiltingpatch.blogspot.com/p/quilt-along-tri-hst.html