This pattern is from "Amazing Crochet Lace". Incredibly easy to do since it is just filet crochet. The recommended yarn is 2 strands held together of Baby Kid Extra by Filatura di Crosa. I used one strand of Patons Lacette. I hated the Lacette until I found this pattern. The halo tends to tangle on itself and you can't rip it out very easily. The super large hook is the key.