I am having a problem with them today too.I cut my block 3 7/8 in. draw a line diagonally from corner to corner and
sew i/4 in on either side of that line. Then cut on solid line and have 2 hst. Don't know what my problem is but one block just doesn't work out right.
I do know I should use same ruler each time but I have 2 laying around and may have used the wrong one, duh!