One skein of Koigu will make several sachets.

From Interweave Knits:

Just the right size to tuck into a drawer or suitcase, Vicki Sever’s heart sachet is worked in mitered squares that build one upon the other. Work fourteen nearly identical squares, stuff the piece with your favorite dried flowers or potpourri (Vicki used lavender), sew the top closed, and you’re done. It’s a good thing that a single skein of yarn will make several sachets--once you’ve made one, you’ll want to make another!

The pattern was introduced in the Summer 2005 issue of Interweave Knits but only with a picture and the link to the online source. It is not available online as of this writing but it did get reprinted in the 2006 Holiday Issue