This is the improved version of my first attempt.

needle: Prym needles 4mm, 60cm and 80cm
yarn: Puppet Lyrics 8/8 in cream

measirements after washing:

• total length 19cm, that is: 7cm of ribbed collar + 10cm of stockinette + 2cm chess board pattern
• “side length” 13cm
• circumference of collar - approx 30cm to 40cm

knitting details

• The collar was worked in rounds from the top downwards.

• cast on 61 stitches

• closed to the round = 60 stitches

• row 1 to 21: knitted 1x1 rib stitch

• row 22: stockinette, added 10 stitches with “knit front and back” = 70 stitches, added raglan stitch markers: 10 - 25 - 10 - 25

• row 23 to 60: stockinette, alternated between 1 row with +8 stitches (added one stitch before and one stitch after each stitch marker) and one row without adding stitches.

• row 61 - 66: knitted chess board pattern with purl 2, knit 2 for two rows

• row 67: elastic bind off as shown in this youtube video by nadelspiel.com