The small version of this scarf is worked in a sport weight yarn, the large in worsted weight yarn. Other than the gauge at which they’re worked, which alters the scarf’s width, the only difference between them is their length. This means the scarf is easily customisable by adjusting yarn weight and length. Modifying the length will affect the amount of yarn required.
it's called "rainbow socks". and it's knitted with short rows. simple self striping yarn... the short row method i used was a yarn over. no wrap & turn. also, i slipped the first stitch after the yarn over. [look on ravelry for more about the pattern?]