Gauge is not absolutely crucial; any differences will be minute.

You will also need one pair of size 000 needles.

This pattern, as noted on the blog post, is based off http://kellymaher.wordpress.com/2007/07/04/ribbed-lace-bo...
(Available on Ravelry)

This pattern will probably fit Blythes without modification and Barbies if made just a little larger.