Oops! I forgot to post the construction details for the smaller versions of this quilt. If you are making this quilt in the smallest size - 39-1/2" X 48", you need to make 7 rows of 9 larger rectangles alternating with 8 skinny rectangles. (refer to the 1/11/12 post for more details, if needed) Then you'll fill in between those rows with the little 1-1/2" pieces - make 6 of those rows.
For the medium sized quilt (44" X 55"), you'll have 8 rows of 10 large and 9 skinny rectangles. Make 9 of the 1-1/2" rows to fill in between.