I had nothing on my needles so I decided to knit a swatch for this sweater.
The pattern calls for a bulky weight and I bought Knit Picks Wool of the Andes, a worsted weight yarn. I forgot about that bit of important information when I decided to knit this sweater with the WOTA yarn I planned to use for another pattern.
Knitting a 4 x 4 swatch would be very important. Gauge is 17 stitches to 22 rows.
I started with the recommended size 10 US needles and got 16 stitches to 20 rows. Not close enough for the time investment in this project. After completing the Musica Mitts using fingering weight yarn, size 3 US needles and colorwork, I must have loosened my grip on the yarn and needles.
So I knit another swatch using size 9 US needles.
Got gauge. Joy.