Originally Posted by tjradj

Have you tried the "make 4 at a time" method?
Take a square of each fabric and place them right sides together. Sew all four edges at 1/4" (don't leave an opening)
Then cut them corner to corner, both ways. Presto - 4 HST's!
I don't know the math for the size for a 1 1/2" HST, but it should be easy enough to fudge. Make 4 and put them together , then measure the size of the square.