Originally Posted by Bree123

If the finished size is 1 7/8" on each of the short sides, then to do the Magic 8 HST's, you'll need to cut each square at 5.5", and that will yield 8 triangles.

If the unfinished size is 1 7/8" (meaning the finished size is EDIT: 1 3/8"), then the Magic 8 square should be EDIT: 4.5".

Yes, I have used that method. It is very good as long as you cut your squares to the proper size & with the grain of the fabric. The downside, obviously, is that is your Magic 8 square is off by a bit, all 8 pieces will be the wrong size. And if you stack your fabric & mis-cut a few squares at once, the problem is multiplied. So ... moral of the story is: measure carefully!