This sideways-knit serape is so simple you hardly need a pattern. Use the suggested stripe sequence … or come up with your own.

Yarn
Approximately 3600 yards Worsted Weight yarn, used double OR
Approximately 1800 yards Bulky Weight yarn

Stripe Sequence as written requires approximately:

Worsted Weight
1000 yards A
500 yards B
800 yards C
800 yards D
500 yards E

Bulky Weight
500 yards A
250 yards B
400 yards C
400 yards D
250 yards E

Since this garment is worked sideways, the seed stitch stripes are vertical.