How to pick the right locks for doll hair

How to know which locks fit our desires and expectations? I think that it is safe to assume that most of us who make dolls do not live in a place that has a nearby farm that produces the type of fine fleece needed for our purposes. Because of this, we are directed towards specialized online retailers, where the only feel we can get for what’s on sale is using the description or pictures. Without much prior experience, one can feel pretty confused and overwhelmed when browsing this market, unable to exactly determine which locks fit their needs and expectations.