I cast on with doubled yarn and as I would like a more wider decolletage, I stArted the pattern at the 8 row of the chart.
I knit the ribbings with 1x1 but I twisted the knit stitch. The ribbigs were made with a 2.75 mm needle, but in the neck I knit two rows with 2.5 and the last two rows with 2.25 mm needle in order to reduce the decolletage.