I’m busy with this very fine cotton crochet throw at the moment, (scarf is light relief) it’s an overgrown granny square and it’s to be a wedding present for my daughter. To give you some idea, this is a picture of it on my double bed - it needs to be for a king size, and three rows back, I was at 150sets of trebles per side. A side takes about 45 minutes now. It’s meant to be a rainbow, but unfortunately I couldn’t get a red, so that one is kind of pink and doesn’t show up as hugely different from the orange on this photo, and the blue is a bit turquoise, but they are the only colours this manufacturer makes. At this scale it has to be exactly the same thickness. Each band of colour is twelve rows. I’m on the blue now, then purple and white again. I’m thinking I might do the spectrum again, but just with 6 rounds - what do you think? Stick to 12?