Used US9s for the I-cord and US7 for the body. Very straightforward.
I loved the striped ones while knitting, but then they ended up like the dishcloth version of an 80s polo shirt! On the striped ones, I did two ridges of each color, and carried the yarn on the edge. I still slipped the stitches for the edging.
They didn’t quite keep a square shape, even after blocking. They really want to be closer to diamonds.
The last picture is of the lovely cloths I received in return from the swap! Thanks to reccalynn70, Kathy5333, sybilr, rebby and umqasim!