Hia-hia Metallnadeln.

To crochet the collar to the inside: stitch with the crochet through the first stitch of the collarCO, slip the stich from the needle onto the crochet, get a yarn loop through both and to the front, slip through the existing loop. Pay attention to your tension!
Ribbing: Ndl 3.5: to avoid the very big bumps from the purl stitches in the first row I knit the first row like this: (k1, s1wyib) repeat till end. Round 2 and all further rounds: (k1, p1 other way round) repeat till end.
Italian BO for all the BO.