I remember from my childhood that size 8 needles are the average size, your mum or your grandma would use to knit you a nice bulky jumper. The needles he needed to use, large enough to manage this yarn he told me "felt as big as broom sticks to knit with". He sells them at his store at Etsy and when he lets me have the link I'll add to this post. He was so nice and even let me try his scarf on.
Then, I saw his whole look which was so many great layers: below