The headband can easily be made from one skein of #5 weight yarn. This pattern comes in an ebook that has several other options:

The beanie can be made by many one skein handspun yarns.
The slouchy hat usually requires two skeins, depending upon the yarn.
The cowl totally depends upon how big you choose to make it. The cowl can be made with a larger hook and thicker yarn and still turn out amazing.

ALL items made using my patterns may be sold.

If you have any questions, feel free to message or email me!