This SCANFIL GOTS certified Organic Cotton Thread Set comes with 3 spools each with 300 yards of 30/2 Extra Long Staple Organic Pima cotton fiber grown without use of chemicals and pesticides. Each set comes with a free wooden thread stand to attractively display threads in the home sewing room. Earth friendly from start to finish. Machine needle size: US 10-14 / NM 70-90. These spools are 30 wt.