You can trace a persons hand onto a piece of paper, so that you can then refer back to it as you’re knitting. Doing this, make sure to mark where the first knuckles all are (where the phalanges meet the metacarpals), these will be important, as will be the lengths of the fingers.

Using worsted weight yarn on size two needles, I get about 5 stitches per inch. I have been told, however, that I knit extremely tight. Make yourself a swatch in standard knit stitch to see if you get the same or not.