I have a Singer Merritt. All of my bobbins are made to go in Singers. I would be afraid to try anything else. I worry because of the age of my machine.

For my Pfaff I use plastic bobbins specifically made for Pfaff. They are smaller than the ones I use in my cheapie Brother. I also use prewound bobbins in echu or lt. grey that have thin cardboard bobbins and never had a problem in either machine. I also have some old metal bobbins that only fit in the Brother, but sometimes they do rattle a bit. For my Feathweight I only use the bobbins that came with it.

Liked the idea one gal had to use up small amounts in bobbins on the top, that's what I do when I make string quilts.

May in Jersey who hasn't touched any of her machines in a long while and is getting withdrawal symptoms, LOL!

I have a Jamone 6600. The place I bought the machine gives bobbins away when you go in for any reason. Needless to say I have lots of bobbins!!

My Viking Designer 2 uses green plastic bobbins made special for it alone. They do not fit on the side winder either. My Kenmore uses plastic bobbins. Thanks for the bobbin site from Joanne's , I found just what I needed.

I found with both my Babylock and my Pfaff that it pays to use the bobbin made for that machine. I couldn't figure out what was wrong when there were so many nests on the bottom of the embroidery. Turns out it was the bobbin. Also matters how the bobbin is wound. The pfaff bobbin can be wound on the "bobbin winder" gadget but I finally figured out after many errors that those Pfaff bobbins that were wound on the "Bobbin Winder" were the ones causing all the problems. then i read in the small print on the box that it doesn't work with Pfaff. So although the bobbin fit on the gadget to wind it, it didn't sew well. After so many problems I learned my lesson. if you are using pre wound bobbins that's another problem to figure out...some work with some machines and some with others. with the Pfaff, it works better to take the cardboard sides off. the plastic ones don't work well with Pfaff at all. They may be ok with Babylock.