This is one of the patterns in my Tunisian Half Double Crochet booklet:
https://drive.google.com/file/d/1-B8GCMgBLaIPfQ9Nyh-Cygzl...
link text

17 stitches, thdc into the top bump for a loose stitch with this yarn and hook combination.
Blue close up is front of stitch, grey and blue is back of stitch.
Length ended at 116 rows = 60 inches. Joined in Tunisian bind off.
To finish the side edges, i had to work 4 stitches into 3 also thdc with a de hook. One row, then sc to finish the edge. This stitch in the back bump of the RP is taller than wide, so it needed to be adjusted for working into the side of the fabric. Start with the same hook as the project, or go up a few sizes to keep it to one stitch into one.

Dishcloth sample in crohook, 25 stitches, 16 rows, same on both sides. Thdc version 2. Weight is 25 grams.