This pattern is available as as part of the KNIT PURL ZEN collection** (4 patterns for 4 euros - a special discount for buying them together ☺).
The texture is produced just with knit and purl stitches.
I find counting as you knit (especially in the round) even more relaxing than just garter or stockinette.
There is a sizing table for fingering - aran weights; small or large single loop (either size can be doubled).
Small loop: allow at least 150m (165 yds)
Large loop: allow at least 200m (220 yds)
For a double loop, double the m/yds.
Thanks to the testers: