Having successfully crocheted the small blue and white square, without having it turn out to be the size of a postage stamp and dense enough to use as a paperweight, I decided to try the bigger multi-colored piece again.
Oddly enough, relaxing and using almost no tension on the string really works!
Can you see both pieces? (The first one is on top of this second one.) They have the same number of stitches!
Here they are next to each other:
What a difference! Let's see how much of this crochet cotton I can use up.