This machine knit Aran-look beanie pattern is in a medium adult size, for Passap e6000 and Duo 80 with Deco.
Although this has been designed as a slouchy beanie, it can also be knitted as a more conventional, fitted style. A very interesting stitch pattern that would look very nice as a garment as well!
I’ve used three strands of soft fine wool or acrylic to achieve this look, and some experimentation may be necessary to get a combination that you like that knits well and easily on your machine, as in the tuck stitch there can be 6 loops on some needles. To help the stitches knit off well a cast on comb and weights can be useful.

Approximately 50-100g of yarn will be needed.

Thanks to ejvc and rolkalm for their advice and testing!