ok. very rough estimate.
37 fat 1/4 cut to 5-1/2 sq = 9 sq per fat 1/4 = 333 sq
this would make about 66 1/4 sq triangles and 66 5" sq giving about 132 squares at 5"
finished size would be 4-1/2
11 across = 49.5" and 12 down = 54"
these are, as i said, rough. i will not be too embarrassed if someone proves me to be completely wrong.
good luck.