From the left, Jane Doll in fingering weight, sport weight, and worsted weight yarn
The first doll I made from Kelly DeSandro's pattern was Ebony Jane, in the center of the picture. I crocheted her with sportweight yarn (Knit Picks Wool of the Andes sport) and a size 1 steel crochet hook. For the second doll, Azure Jane on the right, I used worsted weight yarn (Patons Classic Wool) and a size C hook. And finally, for Emma Jane, on the left, I used fingering weight yarn (Knit Picks Palette) and a size 1 steel crochet hook. The dolls range in size from 8.5 inches, to 9.5 inches, to 11 inches tall.
This is the versatility of gauge, and matching up the yarn and hook to create a firm fabric for making a doll. This way you can satisfy yourself with a larger or a smaller doll, just by changing around the yarn and hook.
I created a wardrobe for Ebony Jane, but I wanted to be able to use the same patterns for the other two girls. I made each of them the basic camisole and undies/pants, plus a cardigan sweater, to work out what hooks and yarns worked best for each doll.
Ebony Jane's Wardrobe includes information for making these garments to fit three different size dolls, depending on what yarn and hook you choose to use.