Info from pattern:

Yarn: any medium weight yarn will work. I used Mainstays, Walmart’s brand, now discontinued.

Stole used 10 oz of mainstays (I had 2 8oz skeins)
Scarf used 4 oz of mainstays (about ½ of 1 8oz skein)

Gauge: I don’t know, didn’t think it would matter much since they’re just rectangles and you can make them as long and wide as you want.