Super thin and very sharp, these needles will easily go through multiple layers of fabric including cotton, wool and silk.  The needles glide through the fabric like a hot knife through butter and won't shred your thread.  25 needles come wrapped in a silver foil package.  1 3/8" long.  Be sure to have a little container to put them in once you open the package.  The needles do have a small eye but most needles threaders including Clover will work.  Once you use these, you'll be addicted! 

Here's what one of our customers has to say:

Just a quick note to tell you how much I have thoroughly enjoyed the Japanese sewing needles and basting thread I bought from you and recently received. The needles glide through everything with no effort and sew wonderfully. They are money well spent! And the basting thread is a dream - just enough drag to hold things together and not slip, yet quite easy to tear and pull out. Just wanted you to know how much I am enjoying both!