I used crochet thread for the baby quilt that I maked. It work great. you canget crochet thread in many differnt sizes the size is numberd 10,20,30 the bigger the number to small the thread I think i used a #10, thet are many brands Aunt Lydia's, J&P, cost&clark,. it also come in many colors. I find my at wal-mart, hobby lobby, JoAnns, Micheals. It is with the yran's. Hope that this is of some help to you.