I recently finished a scarf using my wave pattern. I actually have two versions of the wave pattern. I used the smaller version of the scarf because the Scarfie yarn is a bulkier yarn and I used a size K hook. I only repeated the pattern twice (only has two waves or humps) and the scarf ended up to only 46 inches long, which is long enough for me. If you want a longer scarf, you will need another skein.
Here is the video for the small wave version of my wave pattern: