Two dozen bobbins per bag. Up to 4 bags shipped for the same rate.Nylon thread weight 46 or 69, some of each. Various colors. Different yardage per size bobbin. Really speeds up sewing to just drop in another bobbin. And a lot of products don't require that the bobbin color even shows. I have always used these and always enjoyed sewing more if I didn't have to slow down for bobbin winding. Most of these bobbins fit my Mitsubishi industrial sewing machine. And will probably fit many others.