Ummm...no, you want the block to be 8" FINISHED, right? That makes each square 4" finished. So add 7/8 inch to the FINISHED size you want--cut your squares 4 7/8" (or 5" and trim), draw a line diagonally and stitch 1/4" on either side of it.
Last edited by GingerK; 02-10-2012 at 05:31 AM.