Yesterday I laid out the scarf to check for proportion, hoping that it was long enough. It was not.
This tape measure is 122 cm long. That may be long enough for a narrower scarf, but for this width, it is too short. I have 28 g of yarn left and it looks like I need all of that to get a scarf with nice proportions. If I knit it up in one week, I'll have half a week to spare before the deadline.