0 - Lace (Lace, fingering, size 10 crochet thread)
1 - Super Fine (Sock, fingering, baby)
2 - Fine (Sport, baby)
3 - Light (DK, light worsted)
4 - Medium (Worsted, afghan, Aran)
5 - Bulky (Chunky, craft, rug)
6 - Super Bulky (Super chunky, roving)