This cowl / infinity scarf can be adjusted to be shorter or longer to your needs.

It did use almost an entire yarn cake, so if you want it longer, you’ll need an additional one.

Please note when I say to use the 3rd loop of the previous row’s half double crochet, you’ll be using not the front loop or the back loop, but the loop that’s even behind that traditional “back loop.”
Here’s a helpful YouTube video (not mine)

https://youtu.be/d2nyqJZBfvA

I enjoyed playing with textures on this pattern, and hope you do too!