I like a dishcloth I can wring with one hand. So, not too big, and round works better than square.

There was 1 knot.

I omitted rounds 26-31.
The 3-st i-cord helps keep the edges from rolling up.
3-st i-cord:
Chain CO 2 sts.
*K2, SSK. Pass last 3 sts back to left needle.* Repeat from * to * until 3 sts are left.
How I finished:
PU 3 sts from beginning of i-cord. Kitchener together with last 3 sts. Darn in ends.

SFAC BO post