44" by 53"
An optical illusion!  Thers's only two squares, and they are easy!

This project uses the Log Cabin Foldy Stuff design

Block size--9"
Blocks needed---20 total
  (4 across, 5 down)
Block A
need 10
Block B
need 10
Blocks--------2 1/4 yds EACH of two
      fabrics  (light & dark)
Border--------3/4 yd
Muslin--------2 3/4 yds
      (includes blocks and border liner)
Backing------2 3/4 yds
Center squares--------cut 10 EACH, light & dark--
        2 1/2" by 12 1/2"
From 2" wide strips, cut the following lenghts:
        10 EACH, light & dark--10"-- 2 1/2"
        20 EACH, light & dark---9 1/4"--8 1/2"--7 3/4"
            7"--6 1/4"--5 1/2"--4 3/4"--4"--3 1/4"
Border-----cut 4 1/2" wide.
Muslin-----cut 20--11" by 11"
CONSTRUCTION:---Add strips in the following order (as shown in the blocks above):

Block A: center (dk)--rows 1 & 2 (lt)--3(dk)--4(lt)--5 & 6(dk)--7(lt)--8(dk)--9 & 10(lt)--11(dk)--12(lt)--13 & 14(dk)--15(lt)--16(dk)--17,18(lt)--19(dh)--20(lt)

Block B: Add strips in the opposite order from Block A
HINT: It helps to stack the strips, starting with the longest on the bottom.
Purchase Log Cabin 
Foldy Stuff pattern
This project is not under copyright  Feel free to make copies and share them with your quilting buddies.  New Free Projects will appear from time to time, so log onto Free Foldy Stuff Projects at the home page often.