This pattern is for owl phone and glasses holder.
It is made to hold 17076 cm phone, but it can be easily modified to any size for different devices and I will provide instructions how to do so (made to measure).
Same about yarn, you can use any size yarn with corresponding hook, but it needs to be sturdy, to be able to hold it shape (cotton, cotton blend, macramé cord, t-shirt yarn, ets). I do not recommend using plush or any other soft or stretchy yarn.