I haven't been up to much sewing lately, but I did manage to make these two swaddling blankets from lengths of flannel I had in my stash. It's just a single layer of flannel, with the edges folded under 1/2" twice and stitched down. I made mitred corners for neatness. They ended up being about 38" square. I had several like these that I used with Edmund, and I really liked them for their versatility -- swaddling, nursing cover, floor mat, etc.!
Lord willing, one of these blankets will be put to good use in our family next May! ;-)