There is a link to a .pdf key on the pattern page.

This is a simple chart for a quarter of a square baby blanket I made and doesn’t give instructions for beginning or casting off or for yarn or needles used. The chart could be used with a few modifications to make a triangular shawl or you could knit it more loosely than I did in order to make a lighter shawl. If you want to make a baby blanket, you’ll want to knit it pretty tightly in order to keep the eyelets small enough that little fingers and toes won’t get caught in them.