The first one says it's 91 x 81. I'll assume that 81 is the width.
Buy enough fabric to cut your strips in one piece.
Get 2 1/2 yards of EACH color fabric and cut your strips not salvage to salvage but cut them cut side to cut side (the length of the fabric). Sew them together and the top is done. Fine for a beginner. Just remember to sew one row right to left and the next left to right and you will avoid a bow.
you'll have some fabric left for your stash or could use some to make matching pillows.