The pattern calls for Starbella Flash, but one can use any ruffle yarn.
Gauge is not important for this pattern.
I did not measure how much yarn my work took, but I can get 2 pairs from a skein of Starbella flash.
If you have any questions, please ask. I did my best to describe my technique, but I am a brand new crocheter. Please ask for help on your skills before you tank someone’s design in its ratings.