This pattern can be found in my 2016 book Double or Nothing: Reversible Knitting for the Adventurous.
Since Extreme Double-Knitting, I’ve honed my skills in multi-color double-knitting, and I thought it’d be a good idea to put them to use in my new book. The main thing I wanted to cover that I didn’t cover in the previous book is what happens when you work this technique flat rather than in the round.
I originally conceived this piece as a shawl/shawlette with an unusual stepped-triangle shape. When it was finished, I realized that it was a more flexible garment than merely a shawl. If you fold it right, you can make a fascinating collar that can be worn in concert with a long jacket for extra warmth and style!
The blocked size is approximately 63” wide and 21” deep, as worn (as knitted, reverse those numbers). According to my best calculations, this piece uses 120 g each of Colors A and B, and 134 g of Color C. Even if it’s a little more than that, you should be fine with 200 g of each color.