Skip Navigation Website Accessibility

So Fine! #40 is polyester thread with a 1-inch color-change interval.  Its strength and medium sheen make this quilting thread ideal for any quilting application. The nature of So Fine! thread is different from any other polyester thread.  The smooth, lint-free processing it goes through is a patented process.  This makes So Fine!
#40 thread the only thread like it in the world.  Guaranteed.

  • Available in 35 colors.
  • Exact same thread type as our smooth, lint-free So Fine! #50 thread but in a medium weight #40/3-ply. 
  • Ideal for quilting and decorative stitching. 
Shop So Fine! #40 Quilting Thread

Showing 1 - 2 of 2 results


Superior Thread Variegated #733 Fiery Opal So Fine! #40 1,650 Yds



Superior Thread Variegated #718 Gold Coast So Fine! #40 1,650 Yds