Thank you all for the nice comments!
I do wonder how it will stretch with the additional weight though. How does the Lopi feel to wear?
No doubt it will stretch some in the backside even though it's already been blocked, the current weight alone will probably do it so adding more would likely make the stretching worse. The front isn't under quite the same stress so hopefully it won't stretch too much out of shape - or at the very least retain the shape we see on Braidy himself. Lopi is quite soft (at least in this thickness), felts quickly as you work on it and makes for an almost wind- and waterproof knit, by which I mean that it will eventually soak through but that takes more than an hour in the rain. It's not too scratchy either unlike Léttlopi and Einband, thinner yarns by the same maker.
I'm trying to remember where the hem of Braidy's sweater-cloak fell on him -- knees, or further? On you, I could almost see another inch or two, to give it an even more dramatic swing. But would that extra weight stretch it too far?
Seriously, there would be a huge market for beautiful, flowing garments like that (even beyond the SSSS fandom!). I can't imagine hand-knitting them could ever break even, since it's so labor-intensive. But maybe hand-looming or something?
I estimated it falling somewhere about his knees in the back though the front looked shorter. There's a chance this one will stretch a bit longer just by using it, or it might not, wool will always do as it pleases.
I'll make a note in the instructions on how I figured out the length for mine so it'll be easy to variate.
Hand-looming might actually take longer than knitting, especially if you want to keep the pattern. Easiest and fastest way of creating the Braidy-cloak for cosplay purposes would probably be by printing out suitable fabric at
Spoonflower and sewing it instead. That said the
Icelandic Handknitting Association people knit like machines so there's always a chance of finding a really quick knitter if a long, flowy sweater of any kind is needed.
A small warning though: shipping anything from Iceland, especially this heavy, is going to cost an arm and a leg...