Ok, there has been quite a discussion lately about thread weight in FMQing. Many of you have said you use 50 weight. Well, I just went shopping for new thread and I found 30 wt., 40 wt., but nothing marked 50 wt. is Egyptian cotton the right weight? And is the higher number thinner than the lower number ( like wire, the lower number gauge is the bigger wire)? Help me understand! The people at the store were also confused, and no spool was marked with 50 wt, even that identified as quilting cotton. Where do you purchase this 50 wt. stuff?

My machine seems content with regular sewing thread for FMQing, so I'm not desperate to find this, but would like to know what you all are talking about.