…… it might even be crochet!
@LoobyLoo, the photo didn’t attach. Can you edit and upload again please?
It might be a form of tuck stitch, where threads from several rows are drawn up into a stitch higher up.
Is it a machine-knitted item? Knitting machines can make lots of interesting variations on tuck stitch. Some of these can be replicated in handknitting.
I haven’t seen this exact one, but here’s a blog post about tuck stitch:
This handknitting stitch might give a similar effect if done on slightly larger needles:
Maybe Fisherman’s rib or half Fisherman’s rib?
This is crochet. It’s called the Camel Stitch. There are numerous tutorials on YouTube on how to do this. It’s a great stitch for crocheting headbands or ear warmers.
Thanks, it’s a John Lewis blanket in a hotel bedroom so I suspect it is machine knitted. It’s definitely pulling in thread from different rows